Reviews For CircO2® Nitric Oxide Supplement

Reviews For CircO2® Nitric Oxide Supplement

CircO2 Reviews

282 Reviews   |   3.5 Average Rating   |   65% Recommend This Supplement 

CircO2 has been my answer to procrastination. *
By DONALD G. (PALM DESERT, CA) - 6/12/2019
I have been pleasantly surprised at the increased amount of energy I feel with this product. And with the energy comes an improvement in mental clarity. It never occurred to me that there was a nutritional supplement that could help with procrastination. But this product has done just that. With the help of my new energy reserves, I have been plowing into several projects that have been on the back burner for ages. Definitely worth a try.
  I Recommend This Supplement
  Verified Customer
I LOVE ADVANCED BIONUTRITIONALS. I don't use anyone else for supplements. Thank You.  *
By Ella Jean W. (SEAL BEACH, CA) - 5/27/2019
Ordering from Advanced Bionutritionals is EASY AND NO MISTAKES. THANK YOU. THANK YOU. YOU WILL ALWAYS HAVE MY BUSINESS. I RECOMMEND YOUR SUPPLEMENTS TO ALL MY FRIENDS, INCLUDING MY TWO DAUGHTERS.
  I Recommend This Supplement
  Verified Customer
I would recommend the circ02 nitric oxide to anyone. *
By Julie W. (DAYTON, OH) - 5/23/2019
I find the circ02 to everyone. I even got my my husband to start taking it.
  I Recommend This Supplement
  Verified Customer
I highly recommend CircO2 *
By Mary Beth M. () - 5/17/2019
I never quite know what to expect when I try a new supplement. Often it takes time but I felt a difference with this upon my first dose.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Mark S. (Lakewood, CA) - 5/15/2019
CircO2 is the only product that seems to allow more blood flow. I'm 62 years old and was having problems in these areas. None of the other pills I tried seem to work!
  I Recommend This Supplement
  Verified Customer
Circ02, I don't think I can live without it anymore. *
By Nick D. (Concord, CA) - 5/12/2019
The test strips really complement the Product, they let you know when you may need a blast of Nitric Oxide. Great Product Nick D.
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Alonzo D. () - 4/28/2019
So far so good will tell you more later! Only used one box so not enough time!
  I Recommend This Supplement
  Verified Customer
CircO2 *
By TONI B. (HUNTINGTON BEACH, CA) - 4/12/2019
I was amazed at how quickly and wonderfully my BP became normal after taking CircO2 tabs that dissolve quickly on my tongue. Nitric oxide is an important natural agent in our bodies that helps to maintain normal dilation of our blood vessels which promotes normal blood flow and oxygen delivery throughout our bodies. I also think that circO2 is a much more effective form of nitric oxide than having to swallow a capsule or pill.
  I Recommend This Supplement
  Verified Customer
I don't feel any different, but I think it's good fo me *
By Leigh A. (Rochester, MI) - 4/10/2019
I've been taking Circ02 for over six months I think. The little strip says I have more of it in my body, but I take so many vitamins, I really don't feel any different, so I just keep taking it.
  I Recommend This Supplement
  Verified Customer
Review of Cir02 *
By Larry E. () - 3/30/2019
I didn’t feel any different after the first box. I don’t think I was low on Nitric Oxide. Before I started I tested myself and it showed a dark color.
  I Recommend This Supplement
  Verified Customer
THESE CIRCO2 TABS DO WORK! *
By Gloria Norris S. (Fairfield, IA) - 3/24/2019
THESE TABS WORK WONDERS....I USED TO USE L-ARGININE FOR MY VEINS AND SO DID MY HUSBAND AND MOTHER BUT IT BOTHERED OUR STOMACHS. I LIKE THESE BETTER THAN THE L-ARGININE. THANK YOU FOR MARKETING THESE TABS.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Karen J B. (Maquoketa, IA) - 3/11/2019
I'm not allowed to used any supplements of my own. Maybe in another 6 months to a year I can start to use them. Sorry.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By JAMES R. (CORAL SPRINGS, FL) - 2/28/2019
I'm in my 5 week with CircO2 and the results have been absolutely remarkable.
  I Recommend This Supplement
  Verified Customer
Great *
By Adam G. (Adelanto, CA) - 2/28/2019
this product is an amazing supplement, the first thing I did was test my Nitroc Oxide level with the tester and I found out that I was already at a good level. But after I take it I always feel a boost and it makes me feel sharp and alert, this is a great product and for me its amazing.
  I Recommend This Supplement
  Verified Customer
CircO2 is just fine. *
By SHERMAN T. (EAST JORDAN, MI) - 2/20/2019
CircO2 is often given to my lady friend. CircO2 is often given to her friend too.
  I Recommend This Supplement
  Verified Customer
Circ02 is a sure energy booster. I recommend this for sure. *
By Debbie P. (Sophia, NC) - 2/20/2019
Advanced Bio nutritional is good to their word and products.
  I Recommend This Supplement
  Verified Customer
I highly recommend this supplement by Advanced Bionutritionals *
By George P. () - 2/17/2019
I am using this as a preventative tool. I have tried to keep my oxygen levels up with several products but none has been as easy as this product to show improvement that you can confirm your selves with the stripes that included. No doctors required!!!
  I Recommend This Supplement
  Verified Customer
Depending on your challenge for me I can definitely experience the physical effect of the blood vessel relaxing and a greater blood flow because of this vessel relaxation thruout my whole body and it has definitely added to my greater feeling *
By GARY H. () - 2/17/2019
I guess I said it all in the headline! It worked really well for me.
  I Recommend This Supplement
  Verified Customer
Very good product *
By Lora C. (Sioux Falls, SD) - 2/16/2019
I have had good results with this product, can feel it go work within15-20 mins after the lozenge disolves.
  I Recommend This Supplement
  Verified Customer
Improved *
By Diana N. () - 2/13/2019
I’ve gotten great results with this product, I was surprised this would actually work. I tested my oxygen after and it had improved
  I Recommend This Supplement
  Verified Customer
First box - tested low and achieved normal level in 30 days. *
By Robert S. (Windermere, FL) - 2/6/2019
Just started 2nd box and expect to maintain a high NO level. Easy to use twice daily, and tastes good.
  I Recommend This Supplement
  Verified Customer
My brain is getting the oxygen it needs at last! *
By Michele T. (NEW YORK, NY) - 1/5/2019
Have you gone outside in the forest or to the beach and breathed deeply that first cool breeze. That's how it is with using CirO2. It feels that my brain is expanding and I feel alert and ready to start the day energized.
  I Recommend This Supplement
  Verified Customer
A good product *
By Anonymous (Las Vegas, NV) - 1/4/2019
My husband and I have been taking this for several years and find at age 70 that we are still very active with running, golf, hiking, yoga, strength training and just overall good health. Our bloodwork is great, and we are so much healthier than others our age.
  I Recommend This Supplement
  Verified Customer
A quality product from Advanced Bionutritionals *
By Anonymous () - 12/31/2018
I live in the UK and have not come across a better N Oxide supplement available to buy here in the UK. So I’m happy to pay good money and pay custom fees and postal charges necessary to obtain this top quality health supplement.
  I Recommend This Supplement
  Verified Customer
Very Effective and highly recommended. *
By Barney K. (Canada ) - 12/29/2018
This is an excellent supplement that really works fast and gives me immediate energy that lasts for hours. I take one in the morning and slowly let it dissolve. Try it I recommend it!
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Mark B. () - 12/27/2018
I really like the product but feel it’s way to expensive, if I could afford it, I would definitely continue to use it
  I Recommend This Supplement
  Verified Customer
Excellent product  *
By Ken H. () - 12/9/2018
Feeling better than I have in 10 years. More energy and feeling stronger.
  I Recommend This Supplement
  Verified Customer
Very helpful in making you feel better *
By Anonymous (HEWLETT, NY) - 12/9/2018
for an old man in his 80's it makes you feel younger
  I Recommend This Supplement
  Verified Customer
I highly recommend this product. *
By Leomia C. (Portsmouth, VA) - 12/5/2018
Since my mother has been taking this she has been feeling better in reference to her circulation.
  I Recommend This Supplement
  Verified Customer
Complementary to AB's blood pressure caps *
By John M. (United Kingdom ) - 12/4/2018
I bought these to work with ABP capsules and after less than a week my BP dropped to just below 120/80 which is excellent.
  I Recommend This Supplement
  Verified Customer
My husband's painful spasms are no more.  *
By Anonymous (Australia ) - 11/18/2018
been taking daily CIRC02, spasms are a thing of the past.
  I Recommend This Supplement
  Verified Customer
I absolutly recommed this supplement *
By Roger H. () - 11/16/2018
In the very short time that I have been taking this supplement, I feel there has been an improvement. I have issues with BP, This can only improve my health by increasing my nitric oxide, which will make my arteries, veins, etc. work much more efficiently by being more playable and expandable. Keeping my heart from having to work as hard pumping. Great supplement. Roger
  I Recommend This Supplement
  Verified Customer
Pleased with results! *
By Sheran P. (Gilbert, AZ) - 11/12/2018
I am pretty impressed that Circ02 has helped lower my blood pressure numbers, especially the bottom number. My diastolic numbers have dropped from mid 90s to close to mid 80s. Right now I take just one Circ02 lozenge a day, but will most likely work up to two lozenges at some point. Again, I am most pleased with these results.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By GARY G. (LEWIS, CO) - 10/31/2018
I have noticed that I have more energy and don't tire as easily since I started taking this product
  I Recommend This Supplement
  Verified Customer
Circulation greatly improved *
By LAURA C. (INDIANAPOLIS, IN) - 10/29/2018
I find that I don't get cold as easily, especially my feet and hands. Nor do I get overheated during the hot weather, I seem to adjust to weather extremes much better.
  I Recommend This Supplement
  Verified Customer
This works for me,  *
By Martin J. (Sun City, AZ) - 10/18/2018
I was tired offen, this helps with a clear mind. It inadvertently dropped my blood sugar 30 points !
  I Recommend This Supplement
  Verified Customer
Comments on Taking CircO2. Super product. *
By Joseph A. (Tucson, AZ) - 10/15/2018
I wouldn't live without taking this. Very important for my memory as an older man.
  I Recommend This Supplement
  Verified Customer
BP controlled with CircO2 *
By Norm B. (Aurora, CO) - 9/11/2018
I had my physical today and talked with my doctor about my blood pressure. I told him that CircO2 was helping control my blood pressure better than other things I have tried, He said I could keep taking it since I was having good BP control.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By JERRY B. (FAIRHOPE, AL) - 9/6/2018
With one box I noticed a positive feeling of circulation within my body, related to my performance in bed and throughout the day. I was originally using the L-arginine powder with not much success. However reading about the benefits of circ O2, I had to try it, and am I am glad I did.
  I Recommend This Supplement
  Verified Customer
circO2 *
By June P. (BAY CITY, MI) - 9/5/2018
This is a product I do not want to be without. The varicose vein in my leg improved by 50%. I quit the product for an experiment and the vein went bad again. Back on this great product and staying on it.
  I Recommend This Supplement
  Verified Customer
Love this product by Advanced Bionutionals *
By Yvonne J. () - 8/27/2018
I take I-2 daily. really helps to feel better. More with the program. just a great feeling.
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Meredith W. (Las Vegas, NV) - 8/10/2018
This formula is helping me to realize new energy and vitality!
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Anonymous (WICHITA, ME) - 8/9/2018
It enhances the ability of my cells to product nitric oxide which is crucial for the good health of my arteries and veins.
  Verified Customer
lovely taste *
By Lucy C. (Australia ) - 7/15/2018
Has improved my Nitric Oxide level. I started them last year and now keep taking one a day regularly.
  I Recommend This Supplement
  Verified Customer
Great product *
By Angela H. () - 7/9/2018
I do like this nitric oxide supplement. Sleeping well. My level is slowly but steadily climbing. I was pretty much deficient.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By James H. (Erie, PA) - 6/23/2018
Since taking Circo02 I have improved in many areas of my life pertaining to my weight lifting at the gym and my wife's happiness. It's a over all feeling I know the circo2 is operating...... I also feel like a new man. Thank You :)
  I Recommend This Supplement
  Verified Customer
It really works...and fast! *
By Christopher G. (Sunrise, FL) - 6/23/2018
I’m 46 years old and in good shape. But I’ve noticed a decline in my energy level and stamina. I purchased this product a few times and it has helped me. I’m very happy with it. I recently added the super beets product and together my overall mood is improved, I have more energy and stamina. Even taken alone and as directed, you’ll notice an almost immediate improvement in your circulation and mood. And here is absolutely no crash. The included test strips also work. I tested depleted and was at optimal within a month. I will continue to purchase this and recommend it to others.
  I Recommend This Supplement
  Verified Customer
circo2 *
By Herminia R. (Australia ) - 6/12/2018
I can't belief so quick I have result!. I noticed in 2 or 3 days that may neck and shoulder disappear tension or pain. First day test was low level. After one Box ( 2 time a day ). Now is normal. CircO2? Yes, indeed, it's Fantastic!. 5 Start? not way, 100 is Better! Thank very mach Dr. Janet Zand and the Company. Kind regards Herminia PS. I luck very much the Test strips.
  I Recommend This Supplement
  Verified Customer
i highly recommend this supplement by Advanced Bionutritionals. *
By Andrew O. (Australia ) - 6/8/2018
helps to relax and feel restored-i am feeling more nourrished in many ways
  I Recommend This Supplement
  Verified Customer
Oxygen boost with Advanced Bionutrionals *
By Anonymous () - 6/8/2018
I have been taking Circ02 off and on My blood oxygen level is checked every 2 weeks When I am not taking Circ02 my oxygen level is lower
  I Recommend This Supplement
  Verified Customer
This supplement works! *
By John H. (MCKINNEY, TX) - 5/23/2018
This supplement helps my blood pressure and blood flow. I am now at a level with the optimum amount of nitric oxide in my system. I will continue to use as needed. Thanks.
  I Recommend This Supplement
  Verified Customer
I highly recommend these lozenges for optimizing Nitric Oxide *
By Keith S. (United Kingdom ) - 5/18/2018
Simple and pleasant to take, they dissolve in the mouth in about four minutes. i take one in the morning and one in the evening for optimal results. Saliva test strips are included for convenience .
  I Recommend This Supplement
  Verified Customer
Awesome  *
By Freddie W. () - 4/28/2018
Yes indeed very much improvement from this product healthy and feeling good
  I Recommend This Supplement
  Verified Customer
I would take this *
By Scott L. () - 4/28/2018
I knew there had to be something natural I could take. Found Circ02. Now my cholesterol is 198. First time in my life I’ve been below 200. I’m 55 and love it!
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Hilda S. (Australia ) - 4/25/2018
my husband is taking it for many years and was able to increase his depleted nitric oxide level to “optimal”. His elevated blood pressure has also improved to a satisfactory normal. CircO2 is by far superior to a competitive product which he tried!
  I Recommend This Supplement
  Verified Customer
I really notice a difference with this product! *
By Anonymous (MOSCOW, PA) - 4/18/2018
I have taken Circ O2 for quite a while now but I noticed a big difference right away. My memory was almost immediately greatly improved and I've given some to friends to try as well, because of that. I started recalling things that I usually forgot, like something else I should get while down cellar, etc. Very helpful and I would certainly recommend it.
  I Recommend This Supplement
  Verified Customer
High quality product *
By Anonymous (WICHITA, ME) - 4/5/2018
I've been taking these for a few years so can't really say at this time how they make me feel. I think having the nitric oxide in my system is a very positive action for overall health and disease prevention. My levels remain high when I occasionally test it with the strips. Also love their slightly tart flavor.
  I Recommend This Supplement
  Verified Customer
I highly recommend CIRC O2  *
By Anonymous () - 2/9/2018
Before purchasing any product one needs perform a thorough evaluation of what the problem might be. Without understanding the issue this or any other product might not work for you. In my situation I narrowed down the possibilities and purchased CIRC 02 in hopes it would solve my issue. After taking the product for 6 months it has surpassed my expectation. I am 70 plus years and now enjoy hours each week of sexual pleasure with my partner. She is now satisfied all the time and of course I am also. Wonderful product.
  I Recommend This Supplement
  Verified Customer
CIRC02 *
By Anonymous () - 2/6/2018
Been taking Circ 02 for a month now. I only take one per day and I have noticed that I'm feeling overall better with more energy and better recovery from workouts. I'll be increasing to 2tablets per day soon.They taste good and dissolve fast. I just wish they were less expensive. I gave a box to a buddy and he will be ordering too.
  I Recommend This Supplement
  Verified Customer
Very satisfied *
By Nancy K S. (Las Vegas, NV) - 1/30/2018
My husband and I have been taking CIRC02 for about a year now and are healthy and active at age 69. The taste is quite good too.
  I Recommend This Supplement
  Verified Customer
CIRC02 *
By REGINALD C. () - 1/30/2018
I have noticed I get a tremendous pump during and most the day after my workouts. I enjoy how I feel and would recommend CIRC02 to my friends.
  I Recommend This Supplement
  Verified Customer
Feeling great *
By Raul F. () - 1/30/2018
I tested my saliva on the strip and reading came back as depleted. I’m almost 50 years old and started working out again. I have really noticed my neck and lower back pain almost completely gone, and my mobility is way better. I feel like I have more energy. I can’t wait to finish the product and retest but I feel really good. Great product!
  I Recommend This Supplement
  Verified Customer
I like this product & recommend it. *
By Eugene C. () - 1/28/2018
This product has helped my blood pressure noticeably. I also notice an improvement in my circulation. I will continue to use this product.
  I Recommend This Supplement
  Verified Customer
HIGHLY RECOMMENDED *
By Anonymous (JACKSONVILLE, FL) - 1/8/2018
EASY TO TAKE . NO AFTER EFFECTS. ABLE TO SEE THE EFFECTS WITH TEST STRIPS PROVIDED.
  I Recommend This Supplement
  Verified Customer
Highly recommended *
By Yu-Hsin C. (Taiwan ) - 1/2/2018
Besides, it tastes good.
  I Recommend This Supplement
  Verified Customer
More energy. *
By Patricia D. (Van Horn , TX) - 12/27/2017
It doesn't take long for my body to respond well to good supplements. CircO2 Is a great chewable supplement, and the test strips help me see the results that coincide with the benefits I feel. I'm glad this product is available and happy with the price.
  I Recommend This Supplement
  Verified Customer
Yes *
By Anonymous () - 12/18/2017
Since using CircO2 my knees feel better and tightness in legs and feet
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Anonymous (BUTTE, MT) - 12/18/2017
I hike up hill every morning about 2 miles and I notice that I have more energy and stamina after taking Circ02 and I am 70 years young!
  I Recommend This Supplement
  Verified Customer
More energy immediately *
By Ellen H. () - 11/25/2017
circO2 has made a noticeable difference in my energy, which has increased. My blood sugar readings are lower already.
  I Recommend This Supplement
  Verified Customer
I highly recommend this supplement, CircO2 to anyone. *
By Anonymous (APEX, NC) - 11/9/2017
CircO2 supplement by Advanced Bionutritionals is effective and works as advertised and I recommend it anyone seeking to improve their overall health and wellbeing. The proof that it works is in the test strips. I purchased it for my wife for occasional numbness/cramps/pain in her legs. The test strips to our surprise showed she had Zero NO2 while mine level is at mid-range. After taking the supplement for 14 days she/we tested again with the strips and to our delight the color shows mid-level color, the legs pains/cramps has decreased, an indication that the Supplement works or is working for her. We plan to order another shipment soon and will continue to use it. My wife and I were very skeptical at first but the assurance of using or testing first with the strips before taking it, .... it is that simple, Test before you use it!!
  I Recommend This Supplement
  Verified Customer
I do recommend this product *
By Anonymous () - 11/7/2017
I have been taking this circo2 for a few days now and am feeling better
  I Recommend This Supplement
  Verified Customer
I definitely recommend this product! *
By Patricia B. (MOSCOW, PA) - 10/19/2017
I noticed a difference in my memory and concentration almost as soon as I started using circO2! I was really amazed at how much better I was at remembering things, like when I'd go down to the basement and would recall that I should also get this while I'm down here. The improvement was a pleasant surprise!
  I Recommend This Supplement
  Verified Customer
More energy  *
By Lisa T. (Australia ) - 9/30/2017
I'm 3/4 thru my 1stbox and notice a def improvement in my energy level.
  I Recommend This Supplement
  Verified Customer
Nitric oxide *
By Anonymous (Edina, MN) - 9/29/2017
My husband notices significant improvements when he works out! I also feel that workouts are better.
  I Recommend This Supplement
  Verified Customer
I have already recommeneded circo2 to several people *
By bernard S. () - 8/20/2017
i have read over and over about how we need all the oxygen we can get. the people that make and take hydrogen peroxide food grade have been pounding the idea that more oxy is a must and their way to get it is the best way. after countless hours of research i determined that best and"SAFEST" way was ciro2. your product. i put my money where my mouth s and ordered 600.00 worth and have used it ever since. every one that hasn't seen me in a while say's BUD,what are you doing? you look so much younger. i am 81, really bad heart,5 full knee replacements, failing hearing and eye sight. NOT ANY MORE! THANK YOU.
  I Recommend This Supplement
  Verified Customer
I give circ02 to my husband to help boost the oxygen and circulation to his brain. *
By Nancy W. () - 8/7/2017
I was told vitamin B's and nitric oxide could help. I started giving him the circ02, and the day he takes this his thinking seems better, but the days I forget to give him the pills he starts forgetting again. I think circ02 are great.
  I Recommend This Supplement
  Verified Customer
I highly recommend Cir02 to increase nitric oxide, which opens the arteries for more blood supply thru the body. *
By IRENE S. (RESCUE, CA) - 8/5/2017
I tried many products to increase the blood flow and feel that Circ02 is the best. the tablet is very favorable and goes into the body instantly when chewed and dissolved under the tongue
  I Recommend This Supplement
  Verified Customer
I highly recommend CirO2 by Advance Bionutritional *
By Jaime M. (Doral, FL) - 7/31/2017
The profit is acting as promised in my levels of No2
  I Recommend This Supplement
  Verified Customer
i would recomend this supplment by advanced bionutritionals. *
By Anonymous (Canada ) - 7/22/2017
i`ve been using this product for a month now and i`m quite satisfied with the results that i am feeling. overall it seems to be doing the job it was intended for and that makes me happy knowing that i have a product i can depend on.
  I Recommend This Supplement
  Verified Customer
This is a Fantastic Product. *
By Yvonne J. () - 7/17/2017
I just want to say drink a good amount of water at least 8oz helps Circ O2 work so much better.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Vickie C. (Shoreview, MN) - 6/28/2017
Very pleased with this product. I plan to recommend it to others.
  I Recommend This Supplement
  Verified Customer
I would recommend CIRCO2 by Advanced Bionutritionals *
By JAMES P. (MECHANICSBURG, PA) - 6/25/2017
Since taking CircO2, I know longer have pins and needles in my hands. Will order more.
  I Recommend This Supplement
  Verified Customer
CIRCO2 *
By LILLIAN A. S. (BRADENTON, FL) - 6/13/2017
I FIND IT REMARKABLE BECAUSE I HAD VERY BAD CRAMPS IN MY LEGS AND NOW I DON'T HAVE HORRIBLE CRAMPS ANY LONGER. AS A MATTER OF FACT, TO TRY THIS PRODUCT OUT, I DIDN'T TAKE CIRCO2 FOR THREE DAYS AND YES, THE CRAMP IMMEDIATELY RETURNED. IT'S ONE OF MY FAVORITE SUPPLEMENT.
  I Recommend This Supplement
  Verified Customer
CircO2 is Awesome *
By Amanda R. (New Zealand ) - 6/7/2017
I have recently trialed myself and two other friends the Circ O2. Results have been remarkable. We have all noticed a massive difference in our energy levels through out the day. Clearly we have all been in need of the product. Interestingly we are 3 different types of people also. 1 early 20's Healthy Male, 1 48 year old healthy and fit female, mother of 1, which is me and my colleague Mid 50's female with a variety of health issues. Yet all 3 of us found the product remarkable.
  I Recommend This Supplement
  Verified Customer
It a great product, I love the fact that you can test your own saliva...it's excellent *
By Helen M. (Australia ) - 6/5/2017
I do recommend circ 2 to our friends and we take it every morning
  I Recommend This Supplement
  Verified Customer
I highly recommend this product *
By bobby F. () - 6/5/2017
After using Circo2 I feel more energetic and my blood pressure is much better.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Janis C. (Australia ) - 6/4/2017
I feel so such an improvement taking this product regularly. I am having a better Blood pressure reading & a lot more energy & I am out enjoying a morning walk every day.....
  I Recommend This Supplement
  Verified Customer
Best nitric oxide supplement on market *
By William S. (Elk Grove Village, IL) - 5/13/2017
I was concerned about too much stress to my heart until I found Circ O2 - this supplement gives me the confidence to challenge myself at 50 years of age without worrying about over-stressing my heart and with the added benefit of no side effects. thanks for providing Circ O2 - its been a life changer for me.
  I Recommend This Supplement
  Verified Customer
Highly recommend *
By KIMBERLY T. (MADISONVILLE, KY) - 5/12/2017
These tablets help me have energy they even help me as I work out to have stamina for over 1.5 hours I don't crash from them and I am so thankful for them!
  I Recommend This Supplement
  Verified Customer
Love it *
By Patti Q. (Longview, TX) - 5/10/2017
I have bought this product several times because it works. I had a circulation problem in my shoulder. It took about 3 days taking 2 per day. Now I won't be without it.
  I Recommend This Supplement
  Verified Customer
More sustained energy. *
By Anonymous (DANVILLE, VA) - 5/10/2017
I take Circ02 prior to my morning workout and have noticed I have more energy than if I fail to take it.
  I Recommend This Supplement
  Verified Customer
CircO2 gives me an extra burst of energy *
By EDNA R. (ALPHARETTA, GA) - 3/17/2017
Taking a Cir02 gives me an extra burst of energy. I also take a tablet before working out to increase my energy level.
  I Recommend This Supplement
  Verified Customer
circ O2 worked well *
By Anonymous () - 3/16/2017
i have seen improvement in lower blood pressure and better sexual activity. thanks.
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Dolly M. (Colorado Springs, CO) - 3/16/2017
I have been taking this product but not gone to see my doctor to discuss it.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Sheri A. (Tunkhannock, PA) - 3/16/2017
CircO2 has helped with my energy level. I will take it for the rest of my life! After the 1st month, and my levels of nitric oxide went up, I started taking it every other day.
  I Recommend This Supplement
  Verified Customer
Love this product *
By Noreen N. (Grants Pass, OR) - 3/15/2017
I really felt a difference taking this in the morning. Great flavor, great results
  I Recommend This Supplement
  Verified Customer
I recommend this supplement. *
By Barnabas K. (Canada ) - 3/15/2017
Excellent quality and effective supplement for increasing your energy.
  I Recommend This Supplement
  Verified Customer
Excellent product *
By Anonymous (SUMMERFIELD, FL) - 3/15/2017
I tihink that Circ O 2 is a very good product. I was depleted in nitric oxide when I first started using it. After taking it for 2 months my level is optimal. I have more energy. I will continue to use it. Thank you for this wonderful supplement. I also enjoy reading the literature from Dr Schellenberger and Dr Zand. Barbara R
  I Recommend This Supplement
  Verified Customer
Product is excellent *
By Anonymous (Pueblo, CO) - 3/15/2017
I am 81 so I cannot take it as prescribed, it makes me feel a bit hiper, but I continue to take it.
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Joni L. () - 3/15/2017
I just reordered this product because it works! My husband and I are in our 80's and 90's and our get-up-&-go got-up-& went! After trying lots of useless products, wasting time and money we decided to try Circ02. It worked!!! Our energy surged beyond measure, we sleep better and wake up fresh and ready to start the day! Do we recommend this product? IN A HEARTBEAT!!!
  I Recommend This Supplement
  Verified Customer
Power Punch *
By Ken G. (Hattiesburg, MS) - 3/15/2017
In a 'World" filled with a lot of misdirection regarding health products, . . CircO2 should be congratulated for a product of quality . . . This method of providing Nitric Oxide to the body is superior to any I have tried (AND, I have tried many) . . .Anyone using it should feel the difference immediately . . .
  I Recommend This Supplement
  Verified Customer
I highly recommend CircO2 *
By Mauricio L. (Mexico ) - 12/10/2016
I am starting to try CircO2 in the second one I all ready feel more alert I am keeping sending you what else I am experiencing
  I Recommend This Supplement
  Verified Customer
CircO2 *
By JAN P. (HENDERSON, NV) - 11/7/2016
The last oximetry overnight test shows an almost normal oxygen level from using this product. I may not require night time oxygen therapy in the future. Yay!! I notice more energy also.
  I Recommend This Supplement
  Verified Customer
It is wonderful to be out of pain and looking younger. *
By Anonymous (CLEARWATER, FL) - 10/18/2016
Almost every day somebody will say to me, "How old are You?" It seems the word has gotten around that I don't look like I'm 82 years old. I was born May 4, 1934. I can help but laugh and say, "It's got to be the new supplements that I'm using. Circ 0 2 I fall asleep almost the minute my head hits my pillow. One pastor in my church ran over to where I was sitting and and said, "How old are you?" I burst out laughing and just shook my head. Then I said, "You heard the truth. It seems it's getting around."
  I Recommend This Supplement
  Verified Customer
Highly recommended CircO2 *
By Keith S. (United Kingdom ) - 10/14/2016
Very effective at naturally maintaining optimum Nitric Oxide levels.
  I Recommend This Supplement
  Verified Customer
I highly recommend CircO2 *
By Reg S. (Cherryville, NC) - 10/8/2016
CircO2 has truly made a difference in my overall breathing , sleeping, and energy levels. I am about to order another three month supply.
  I Recommend This Supplement
  Verified Customer
Circ O2 does the job *
By Angela D. (Fairfield, CT) - 10/7/2016
This product works effectively and is easy to use. I used it while traveling in the high mountains of Peru and had no problem with the altitude. I will use it again when visiting other high altitude places.
  I Recommend This Supplement
  Verified Customer
I highly recommend this supplement by Advanced Bionutritionals *
By Alex M. (Dallas, TX) - 10/6/2016
My energy level is elevated when I consume the CircO2.
  I Recommend This Supplement
  Verified Customer
Circ 02 *
By James E. B. (Ferriday, LA) - 10/6/2016
I certainly recommend this truly delicious locenge. It's so easy to take. And makes me feel great. Great way to increase your Oxygen.
  I Recommend This Supplement
  Verified Customer
Great Health help *
By Gene C. (England ) - 10/6/2016
CIRCO2 is great and I feel so much better since using this supplement. I do recommend this product from the Company Advanced Bionutritionals. Delivery was particularly fast too.
  I Recommend This Supplement
  Verified Customer
Circ02 *
By JUNE P. (BAY CITY, MI) - 10/6/2016
Love it! Better energy, gums healthier, varicose MUCH better. Love it!!! I highly recommend it.
  I Recommend This Supplement
  Verified Customer
CircO2 OXYGEN BOOSTER *
By Janet D. (SUNLAND, CA) - 10/6/2016
I love this product! I now work three jobs, do yoga, martial arts, and I'm 62 years old. I have researched many supplements, and keep on top of my eating habits to help me to keep up my stamina and my immune system functioning well. I did notice a slight shortness of breath when I would walk uphill, so I decided to try your product, which boosts oxygen and circulation. I feel much better and do not get tired easily , my body feels stronger now than when I was in my forties. I love the test strips that come with the product that tests your levels of oxygen in your body[ mine tested very low before taking the product, and now I'm good.} I will definitely be reordering soon, as delivering oxygen to the cells is vital in the healing process of the body and brain.
  I Recommend This Supplement
  Verified Customer
i highly recommend this supplement by Advanced Bionutritionals *
By Mel R. (Fontana, CA) - 10/6/2016
i noticed a big difference in the energy that i didn't have before. and its so easy to take, once in the morning and once at night. thats it.!!!
  I Recommend This Supplement
  Verified Customer
I highly recommend Circ02 by Advanced Bionutritionals.  *
By Diane G. (Canada ) - 9/30/2016
I noticed within days that my circulation improved and I was much more alert. The test strips are very helpful too. I was at a nearly depleted level. I'm on the rise - thank you. I will be reordering this supplement.
  I Recommend This Supplement
  Verified Customer
I recommend CircO2 by Advanced Bionutritionals *
By Anonymous (Beavercreek, OH) - 9/29/2016
I've been taking CircO2 for some time now, and while the test strip only shows "low", it's better than "depleted". At 83 I find it hard to remember to take a second one in the middle of the afternoon, so I guess I'll have to be satisfied with that.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Oscar D. () - 6/1/2019
I'm having very good moods in the morning since I started taking the supplement.
  I Recommend This Supplement
  Verified Customer
Hoping for success  *
By Tay G. (Australia ) - 5/29/2019
Just finished my first box using the test strips initially I had a low level using the strip at the end of my first box I am now up to the next level mid range.
  I Recommend This Supplement
  Verified Customer
Great Customer Service *
By veronica K. (Indianapolis, IN) - 5/23/2019
Although this product didn't agree with me, I'm impressed with the Customer Service of Advanced Bionutritionals. They stand behind their guarantee. I wouldn't hesitate to try more of their products because of that.
  I Recommend This Supplement
  Verified Customer
Keeps my blood pressure down *
By RONALD J H. (HOPKINS, MN) - 4/20/2019
The product has help me with sleeping. I am now more active.
  I Recommend This Supplement
  Verified Customer
I recommend to try it out and see for yourself. *
By Bill G. (Irving, TX) - 4/2/2019
Honestly, I don't how to tell unless everything is working so well nothing sticks out to me.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Bill M. (Australia ) - 3/31/2019
I recommend the Circro2 supplement by Advanced Bionutritals as it raised my N0 readings to a good (higher)level very quickly.IF the good results continue, I'll raise the overall rating to 5 stars.
  I Recommend This Supplement
  Verified Customer
Blood pressure decreased *
By Lowell B. () - 3/13/2019
After taking circo2 for just a short time I have noticed a decrease in my blood pressure which is a good thing, since it has been high.
  I Recommend This Supplement
  Verified Customer
Unable to evalute *
By Lawrence M. (CHESTERFIELD, MO) - 3/10/2019
A cannot say for sure whether I have benefited from Circ O2. The only positive thing that I can add is that I made it to age 84.
  I Recommend This Supplement
  Verified Customer
A little soon, but seem to have more energy. *
By LARRY J W. (STOCKBRIDGE, MI) - 3/10/2019
I haven't taken this for long, but I do seem to have a little more energy. I'm hoping for more improvement as time goes by, including my brain (memory, recall, etc.).
  I Recommend This Supplement
  Verified Customer
CircO2 *
By INGRID C. (ROSEVILLE, CA) - 2/23/2019
It’s only one month since I started taking circO2 and I believe my oxygen, breathing,has improved .
  I Recommend This Supplement
  Verified Customer
Good stuff *
By Thomas K. () - 2/16/2019
I’m pleased with the results from the use of this product
  I Recommend This Supplement
  Verified Customer
I do recommend this product it did a great job  *
By Ewald W. (Mexico ) - 2/13/2019
I have used Advanced Bionutritionals for some time and I am happy with the result,Ewald
  I Recommend This Supplement
  Verified Customer
Excellent Product  *
By Winston D. M. () - 1/16/2019
Blood Pressure Reading Had Improved in 2wks Energy has Increased
  I Recommend This Supplement
  Verified Customer
Try this out *
By Anonymous () - 1/12/2019
After trying this product and seeing the results I decided to continue using it to see if it would continue to produce the same results and it does.ive tried other similar products and they didn’t give the same results as this product did.give it a try and see for yourself
  I Recommend This Supplement
  Verified Customer
I recommend the CircO2 by Advanced Bionutritionals as a daily supplement. *
By Thomas W. (CARY, IL) - 12/27/2018
I have been taking the CirO2 now for months along with other natural health supplements and I feel I have more energy and reduced joint pain discomfort.
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Anonymous (Rochester, MI) - 12/9/2018
After four or five months, my levels of nitric oxide finally reached the optimum level, but I had to quite taking the lozenges for a couple of weeks, and they went right back down to 0. The fact is, it's very difficult to absorb and retain nitric oxide in this way. In any case, I will keep on taking Circ02 because I know how important it is for my heart health. Because I bike 2 hours a day, lift weights, and take 80 or 90 supplements a day, it is very difficult to tell whether Circ02 does anything for me at all - but it does taste good.
  I Recommend This Supplement
  Verified Customer
I definitely Recommend this product for anyone that’s interested *
By Timothy G. () - 12/4/2018
I’ve tried other products claiming to bring these results but this is the first one to actually work for me.within a week of use I could tell a difference in my energy levels and overall state of mind plus thier promotional offers made it hard not to try,thanks so much advanced bionutritionals
  I Recommend This Supplement
  Verified Customer
On box one of CircO2! *
By Joyce M. (CATONSVILLE, MD) - 11/22/2018
I am noticing more energy and an overall healthy feeling!
  I Recommend This Supplement
  Verified Customer
Mixed results *
By J Bradford P. () - 11/11/2018
I was hoping for better circulation in my feet. I was hoping for some help. That didn’t happen. However, I have noticed clearer thinking, easier to remember names and faces and a general sense of well being. I only take the tablets once a day and the first box is almost gone. I plan to keep taking it and see what happens. And yes I would recommend this product circO2. Hilliard OH.
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Lene R. (Denmark ) - 10/28/2018
It is OK - I do not feel any difference but maybe I have a little more energy.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Robert G. () - 10/26/2018
I have been taking your product for 3 weeks.Not much change so far.I have Faith.I do feel well,energy wise.Initially I was very low testosterone.I haven't checked last level testosterone for 1st box.
  I Recommend This Supplement
  Verified Customer
Have used circ02 before & was very pleased with the results *
By Barbara H. (Canada ) - 10/19/2018
Back on CircO2 again it worked so well when I had a lung infection, am sure that's why I got better very quickly. Now I am older just need that extra boost of energy. Everything just gets better & great to have that extra energy to get through the day. I have recommended this to a friend who was also impressed.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Anonymous (Rochester, MI) - 9/7/2018
I have been taking vitamins, minerals, glandular extracts, and herbs for 40 years, and most of the things I take produce dramatic results - the overshoot effect. Circ02 doesn't seem to do anything I can feel, but the indicator that comes with the packet shows slow improvement. I apparently was really low, and now, after several months, the indicator puts me in the medium range. So, I will keep taking it, even though I'm not sure what it does for me.
  I Recommend This Supplement
  Verified Customer
Circo02 *
By Raneta R. (San Diego, CA) - 9/3/2018
I like this product as it is chewable and easy to take and comes with a measuring strip which is easy to use. Seems to be giving me a little energy
  I Recommend This Supplement
  Verified Customer
Works *
By Anonymous () - 8/18/2018
I had to cut 1 melt pill in half. It works sooo well that I couldn’t sleep at night. The circulation worked sooo well that 1 full melt went into the night for me. After I cut it in half and took only 1/2 a day(morning) I slept better and my energy level was up and my legs didn’t hurt so bad.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Glen M. (Australia ) - 8/17/2018
I recommend this supplement as am feeling a lot more energy than before. Please note that I am taking many other supplements and products from different sources, so cannot attribute the benefits to any one particular product. I will however continue to use Advanced Bionutritional's products.
  I Recommend This Supplement
  Verified Customer
So far so good. *
By Anonymous (KENOSHA, WI) - 8/9/2018
I have a long way to go to help heal my problem, but I feel this supplement is helping to achieve it.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Anonymous () - 6/1/2018
It seems to be helping, but I was very low so it may take longer. I recently purchase 4 more boxes so we will know some time in the future.
  I Recommend This Supplement
  Verified Customer
I have noticed improvement! *
By Paul H. () - 5/7/2018
Started taking the twice a day and have notice a nice difference and remembering things much better.
  I Recommend This Supplement
  Verified Customer
CircO2 review *
By Richard M. (Castro Valley, CA) - 5/5/2018
Taken daily. I have more energy during my walks. I seem to be less drowsy during the day. My attention seems to be more focused.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Anonymous (ANTIOCH, CA) - 4/27/2018
Has kept blood pressure lower. I would recommend for sure.
  I Recommend This Supplement
  Verified Customer
I would recommend this product. *
By Anonymous () - 3/15/2018
Noticed a difference the 3rd day after taking the product.
  I Recommend This Supplement
  Verified Customer
Just a couple of weeks... *
By Robert W. (SUN CITY CENTER, FL) - 3/2/2018
I can say this after taking them a few weeks. I am older and still work out a little in the morning before I start my day. Seems like I had some pain in both shoulders during the workout which I don't experience any more. My energy level is good however, I did introduce a few other supplements at the same time. I don't know exactly which is working but I guess the point is.....something is working. I plan on staying on this particular supplement and see how it acts with my daily activities.
  I Recommend This Supplement
  Verified Customer
BP Slowly Going Down *
By Judy A. () - 2/9/2018
My BP has recently been in the 200/100 range and very resistant to any intervention diet, exercise, etc. After 3-4 weeks of taking Circ02, it is running in the 170 range. I will continue taking Circ02 to the end of my 3-month supply to see if my BP continues to drop. If it does, I will certainly keep taking it as nothing else has helped.
  I Recommend This Supplement
  Verified Customer
highly recommend Circ02 to anyone having problems trying to make it thru a workout. *
By Brian D F. (FREMONT, NH) - 1/25/2018
I am am 87 years old. I workout one and a half hours a day.Seven day a week and I seem to be doing well.
  I Recommend This Supplement
  Verified Customer
It is my favorite - CircO2 *
By BARBARA H. (KENOSHA, WI) - 11/29/2017
I believe the product is helping with my circulation problem. It is clearing up my discolored legs from the bad circulation. I want to believe that it is one of the supplements I take that is helping.
  I Recommend This Supplement
  Verified Customer
Circ02- Recommended *
By John G. (Bloomingdale, IL) - 9/19/2017
I have used Circ02 for a month now and have noticed increased alertness and energy which is welcome.
  I Recommend This Supplement
  Verified Customer
Circo2 *
By Anonymous () - 9/7/2017
I started these tablets two weeks ago. I chewed one in the morning and one at night. I thought they would keep me up at night but they didn't. I started feeling more energetic about a week later, at least that is when I realized I was as tired in the day. Now I take one tablet at noon each day. I haven't found I'm losing any weight, but I do have more energy.
  I Recommend This Supplement
  Verified Customer
I need to use more than two capsues per day *
By Geoffrey B. (EXETER, NH) - 7/17/2017
The instructions say to use no more than two capsules per day. This dosage will not raise my nitric oxide above depleted, nor lower my blood pressure. By taking more than two per day I can get my readings to low. This is when I see significant decreases in my blood pressure.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Anonymous (France ) - 6/28/2017
I will admit to not taking them diligently, as life has been a bit of a roller-coaster, but I will also say that I am sure that they have increased the circulation in my feet and legs, for which I am eternally grateful.
  I Recommend This Supplement
  Verified Customer
Why I like circ02 *
By Anonymous (Canada ) - 5/12/2017
cir02 has made my life better in several ways. I sleep a lot better and so wake up feeling good. My memory has improved (I still have trouble with people's names). I have more energy and certainly enjoy life more -- no occasions of frightening "brain fog". I am leery about purchasing things on line but I am glad I did. Inger
  I Recommend This Supplement
  Verified Customer
I HIGHLY RECOMMEND THIS PRODUCT. MY ENERGY LEVELS IMPROVED. *
By Anonymous (Australia ) - 3/16/2017
TEST STRIP SHOWED MIDDLE RANGE -TOOK PRODUCT FOR 2 MONTHS AND NOW IN TOP RANGE. MY DAUGHTER'S TEST SHOWED NO COLOUR SO NOW TAKING THE PRODUCT FOR A TIME TILL SHE SHOWS THE DEEP PINK COLOUR.
  I Recommend This Supplement
  Verified Customer
It is refreshing and we think that it is helpful *
By WILLIAM G. (SEBRING, FL) - 3/16/2017
My wife it taking it and it seems to be effective and it motivates her
  I Recommend This Supplement
  Verified Customer
A helpful supplement *
By MARION V. (HONOLULU, HI) - 11/24/2016
I have been taking circ o2 for about a week and I do feel more energetic. The tablets are very easy to take and they melt very quickly in my mouth. Haven't noticed any increase of better memory, but I hope this happens as I continue to take this product
  I Recommend This Supplement
  Verified Customer
Rave Reviews for Advanced Bionutritionals  *
By Anonymous (Petaluma, CA) - 10/12/2016
I'm getting rave reviews from my friend who is using Advanced Bionutritionals. I bought it as a gift for her and she is loving it! I can't give you her name etc. because she wants to be anonymous; that is why she ordered through me. She would give it 4.5 stars only because there is always room to grow a bit. I will get some for myself when I can afford it.
  I Recommend This Supplement
  Verified Customer
Good Review *
By Lillian B. (Bluffton, SC) - 10/6/2016
When I remember to take it, I do seem to have more energy.
  I Recommend This Supplement
  Verified Customer
CircO2 works  *
By Marek K. (Warszawa) - 10/6/2016
I use it for about 1 month. I feel happy and much more willing to be active.
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Sandra H. (Sterling, VA) - 10/6/2016
I have only used this for 30 days, but I did notice a small uptick in my energy level. Enough that I decided to give it another 90 days try.
  I Recommend This Supplement
  Verified Customer
CircO2 is a great product! *
By EDWARD C. (EL CENTRO, CA) - 10/6/2016
My wife & I now take this every morning before anything & it helps us get our energy going to start the day!
  I Recommend This Supplement
  Verified Customer
I recommend this supplement by Advanced Bionutritionals *
By Sheila G. (Pittsburgh, PA) - 5/26/2019
I have been taking CircO2 for less than a month and am taking it in conjunction with Perfect Amino. Although I have not experienced the boost in energy CircO2 has promised to deliver, I have noticed more strength in my tennis serves and general play.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By PATRICK F. (NORTH CANTON, OH) - 5/19/2019
I haven't had any noticable reaction yet, I'll let you know when I do!
  I Recommend This Supplement
  Verified Customer
Circo2 *
By Frank S. (Park Ridge, IL) - 5/15/2019
I have been using for a month and I am still low on nitric oxide levels. Don't know if helping me. Will continue till supply runs out.
  I Recommend This Supplement
  Verified Customer
Circ02 *
By Lewis M. (Denton , TX) - 3/28/2019
The first day I took a whole tablet it lowered my BP the whole day, since then I have not seen the same results. I took the product as a recommendation from a gentleman that took to keep his BP lowered he was senior to me but he only took one half a tablet a day as a regiment. Could be that I don't understand the product well. I will continue to use the remainder of the product, I see no issue with the supplemental value.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Chester D. (Flowery Branch, GA) - 3/12/2019
TBH, I really do NOT feel any different after taking these supplements for over a month??
  Verified Customer
If hiking in high elevations, I would recommend this supplement *
By AUDREY S. (MOKENA, IL) - 2/22/2019
This supplement helped when we were in Colorado (8000+ elevation). With it being so costly, I am not sure I would be able to take this on a regular basis, or recommend it to a friend to take regularly. And one bottle did not show any improvement once we returned to Illinois.
  Verified Customer
Probably a good product *
By ALAN C. (PORTLAND, OR) - 1/26/2019
I've been thinking I needed to open up my arteries to feel better and yet I tried the test strip before I tried the circO2 and it showed Optimal on the strip. The next day I tried the circO2 and tried the test strip which was the same Optimal color on the strip. I waited again and repeated the sequence and still get the optimal with or without the circO2 so my conclusion is that I don't need it although for someone who does I think it would work and be a help. Wish I had a way to test before I bought.
  I Recommend This Supplement
  Verified Customer
CO2 Product Review *
By James M. (BOCA RATON, FL) - 12/20/2018
I am taking CO2 because of the claims that it is beneficial and chose this product because of a specific recommendation from my family doctor that it the best choice. However, I have not experienced any benefits from it that are apparent to me. I plan to discuss the need to take it with my doctor in the near future to decide if I wish to continue with it.
  I Recommend This Supplement
  Verified Customer
I recommend this product. *
By Gerald R. () - 12/8/2018
There is definitely an improvement from this product, but after many months of twice a day I only measure medium on the test strip. Maybe it's my age, 70.
  I Recommend This Supplement
  Verified Customer
Circ02 benefits  *
By Mark B. () - 12/2/2018
I have been in Circ02 for a month now and I can see no change in anything. I believe there are benefits but not seeing them. I will continue for another month and hope to see some benefits.
  I Recommend This Supplement
  Verified Customer
Substantially good product *
By Matti K. (Finland ) - 11/30/2018
Three packages of the product rised standard test rate of the Nitric Oxide levels of mine slightly.
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Anonymous (Clovis, NM) - 11/16/2018
In addition to CircO2 I am taking L-Citrilline in a pure powder form and I do not know which one is most responsible for the high level of nitric oxide revealed by the test strips.
  I Recommend This Supplement
  Verified Customer
Circo2 *
By Charles F. () - 9/20/2018
not much difference in my overall health. but a lady who took two on different occasions testified of improved libido
  Verified Customer
CircO2 *
By FRED S. (FERNDALE, WA) - 8/1/2018
I have taken these tabs twice daily for quite awhile but the indicator strip pads always read LOW. No advice is provided regarding how to increase the level to OPTIMAL.
  Verified Customer
CircO2 *
By AVANIS F. (FREDERICK, MD) - 5/4/2018
Easy to take, but i do not know whether it has any affect.
  Verified Customer
Circ02 *
By James B. (Australia ) - 1/16/2018
I used this product before. the reading I got then was always light pink after 3 boxes.. I am halfway through the box I received and the reading is still light pink. At this stage I can not recommend this supplement
  Verified Customer
Tasty Lozonges *
By MYRON S. (LENOX, MA) - 12/7/2017
I've been using the product for quite some time now, and am still awaiting noticeable results. It may be working for some, but I've not had any real change in my well-being. I'm not about to give up.
  I Recommend This Supplement
  Verified Customer
CIRCO2 Easy to Take, Tastes Good *
By KW C. (BRIGHTON, CO) - 11/25/2017
Have not been able to test it under strict controls, but no harm in continuing to use it !!
  I Recommend This Supplement
  Verified Customer
CircO2 *
By Andrew N. (Coeur D Alene, ID) - 11/10/2017
We have been trying Circ O2 for a few weeks now. I know effects can't be expected immediately butadvertising did suggest some effect would be noticed by now. I will give it a fair trial run but if no benefit is noticed, I will ask for a refund.
  Verified Customer
Still wondering after almost a month of the 3 month supply. *
By DAVID L. (BROOKLYN, NY) - 10/25/2017
I have previously tried another of these beet-based nitric oxide enhancers, which promised but did not deliver a same day energy surge, as well as beet juice (I don't mind the flavor at all). The description of ingredients for this product seemed more promising. But the test strips for all 3 have so far, hardly ever risen above the mid-range ("needs improvement"), and then only when I have used the product the previous night (as well as morning). It's as if my aging body is just not built to enjoy higher nitric oxide levels. Perhaps others have a better experience. I will not renew if things don't improve.
  Verified Customer
I am still in the trial stage so I am unable to highly recommend this product so soon *
By Anonymous (GREAT BEND, KS) - 10/19/2017
I have taken l box of the product and have not experienced any increase in my energy level. However, I am 83 years old and I have a very erratic sleep pattern, I have not had a good night's sleep for a long time. When I checked the color of my saliva is was less pink than the weakest one shown. I have only taken one tablet a day and I want to start 2 times daily. I am somewhat hesitant as to how strict the 12 hour schedule. I have not given up on this product---I just more time (I think).
  I Recommend This Supplement
  Verified Customer
Unsure *
By Anonymous (CALIFORNIA, MD) - 9/30/2017
I continue to use and have reordered three time (six boxes each order) and I'm not sure yet if it works or not. I just have no way of telling (in my case) but from what I read at my age, I should be taking nitric oxide booster. Not sure at this time if I can recommend this product to a friend.
  Verified Customer
Not yet *
By Brian S. () - 9/29/2017
So far I have not experienced any change. I do know we are all different and sometimes things work quickly with some. I shall keep taking the lozenges and believe for them to work.
  I Recommend This Supplement
  Verified Customer
Circ02 try it *
By Anonymous (CORRALES, NM) - 8/26/2017
I have not noticed any difference but has only been a few weeks.
  Verified Customer
Mixed Results with CircO2 *
By Dick S. (SALEM, NH) - 6/25/2017
I purchased this product with high hopes. Took one lozenge/d at bedtime. Did this for about two months. The indicator strip showed low nitric oxide levels in the midrange. So decided to take two lonzenges/d, one in the morning and one in the evening. This increased the nitric oxide levels into the high range but on the low end of that range. I'll start testing BP to see if this works. It didn't with one lozenge/d. Two/d is kind of expensive.
  Verified Customer
circo2 *
By Anonymous (Northern Ireland ) - 5/12/2017
I would recommend this supplement to other people who have never had this product in their lives before especially here in the UK as a whole thankyou.
  I Recommend This Supplement
  Verified Customer
CircO2 result on me *
By Anonymous () - 3/27/2017
I notice increased level of energy after taking 1 tablet. However I stopped taking it because it reduces my BP. My BP is already in low end by default.
  I Recommend This Supplement
  Verified Customer
No idea! Let people choose by themselves. *
By Joseph D. () - 3/15/2017
I use Circo2, but see any improve! I use many different CirCo2 products from different companies!!! Too expensive!!! Joseph,
  Verified Customer
Not necessarily recommended *
By Cheryl J R. (Hernando, FL) - 3/15/2017
I can't FEEL any difference in my overall health after using CircO2 for two months or so. Maybe it's helping, but I can't vouch for positive effects at this point.
  Verified Customer
No results. *
By Anonymous (PAGOSA SPRINGS, CO) - 3/15/2017
I tried the tablets even though my test strip showed "optimum". I did not have any noticeable difference, but my daughter, who has altitude problems, did feel some difference at 7500', (my altitude) she lives at 5000' altitude.
  Verified Customer
Have recieved the circ02  *
By Svend Aage A. () - 11/16/2016
have started to use the circ02 but only for a couple of day so are not able to say if my condition have become better ,however will let you know when the treatment is finished
  I Recommend This Supplement
  Verified Customer
Circ O2 review. *
By BOGDAN B. (PELLA, IA) - 11/2/2016
Overpriced, but it tastes good. I am better off buying citrulline tablets and chewing on them.
  Verified Customer
Thanks for asking *
By Fred B. (Sunland, CA) - 10/6/2016
I feel like I felt before I started Taking your product
  I Recommend This Supplement
  Verified Customer
No Noticeable results *
By Kathy B. (Phoenix, AZ) - 10/6/2016
I only took these for 30 days to see if I noticed any significant results and I have to say I did not. I think it's recommended to use for a longer period of time, but the cost prohibits me from a lengthy trial after not really seeing any effects.
  Verified Customer
Yes and no *
By Joseph C. (BERKELEY HEIGHTS, NJ) - 10/6/2016
Not sure of the benefit yet. Not much has changed per the strips
  I Recommend This Supplement
  Verified Customer
Circ02  *
By John C. (Almond, WI) - 5/5/2019
Little more energy thinking of tryin that beet powder stuff
  Verified Customer
CircO2 *
By Mark R. (Carlsbad, CA) - 3/27/2019
While my nitric oxide level has improved, I'm not feeling any benefit
  Verified Customer
What I have Noticed With NO  *
By MARLIES C. (Martinez, CA) - 3/20/2019
Been taking Circ02 for over a month now & so far there has been no change in how I feel. I bought a 3 month supply & I will continue it until finished. I am so afraid it works like most things that sound so amazing but don't quite achieve what they say. It was a big decision to make the purchase. I also purchased the book by Dr. Zand & Nathan Bryan,-"The Nitric Oxide (NO) Solution" to be more informed.
  Verified Customer
CircO2 *
By Anonymous (Emmett, ID) - 12/26/2018
Circ 02 has no noticeable impact on my current physical health.
  Verified Customer
CircO2 *
By John C. () - 11/26/2018
Not sure if product has helped or not. If product was cheaper I would try it longer.
  Verified Customer
CircO2 *
By Katharyn D. () - 8/28/2018
I used this product and could not see any difference in how I felt
  Verified Customer
Review of Circ02 *
By Anonymous () - 6/25/2018
I Take it everyday but I see no changes, so I don't believe it works for me. It tastes good though.
  Verified Customer
Sorry no great breakthrough *
By Anonymous (Vacaville, CA) - 6/23/2018
Wish there had been more test strips to measure things. My subjective experience was no real change in health,energy,etc.
  Verified Customer
some difference felt *
By Jane W. () - 5/5/2018
I took this product as directed. It may have been beneficial, but no real difference in my energy level was felt. The product is way too expensive for the results you get.
  Verified Customer
Did not work *
By Herbert L. () - 1/25/2018
I have not feels any difference in my body, it did not work for me and I think I paid too much for something that does not works like they promoted.
  Verified Customer
CirCO2 *
By Valence N. (HAYWARD, CA) - 11/13/2017
Can't really say that it has made a difference in my life. I'm on my third box and so far everything is the same. My BP has not moved significantly, so I am reluctant to say that it has helped.
  Verified Customer
Just didnt work for me *
By Billy L. () - 10/31/2017
I tried it for a month an the test strips never change from depleted.
  Verified Customer
I have not noticed a difference since I began using this product. *
By Anonymous (Allison Park, PA) - 7/31/2017
I have been using CircO2 for about three weeks and I haven't felt any particular effects. If I don't feel any diffenrnce in the next two weeks I willl return it. No product works for everyone.
  Verified Customer
I would not recommend this product  *
By Natarina D. () - 6/25/2017
I took it for few days, but I stopped because it decreases my BP. My BP is usually normal, but I felt dizziness after taking Circo2. No positive effects on me. Not for me. I'm planning to return to you soon.
  Verified Customer
Effect very gradual *
By Gene L E. () - 5/18/2017
I've only been taking CircO2 for about a month. Have noticed only slight improvement, so far. I bought a three months supply, so will continue testing it. Might need more test strips. Can't really recommend it one way or the other, yet.
  Verified Customer
This Product did not help me *
By Lea A. (Bakersfield, CA) - 5/10/2017
I really had so much hope that this product would do all it said it would do...and maybe it would for someone else. But it did not for me. I keep hoping and I will keep trying products but this was not the one for me.
  Verified Customer
I Would not recommend this product  *
By Anonymous () - 3/17/2017
I feel no difference in the way I feel when taking this product.
  Verified Customer
Circo 2 *
By ROBERT L. (GILBERT, AZ) - 3/15/2017
the product is pleasant to the taste but I haven't really seen any difference or marked benefit from taking it. No visible effect on those nitric oxide indicator strips either. I don't feel worse either but I can't objectively say that this was money well invested. Hard to determine at all what kind of bang for the buck I am getting from Circo 2, which I find overpriced for what it's done me thus far.
  Verified Customer
I probably will not recommend this supplement by Advanced Bionutritionals. *
By ALENE S. (KENMORE, WA) - 11/17/2016
I experienced no change in how I felt. The small wand simply changed color.
  Verified Customer
I'm still out to lunch on this. *
By Anonymous (SIMI VALLEY, CA) - 11/16/2016
I'm not really noticing any impact yet. Will hold my opinion until I run out.
  Verified Customer
At this time I would not recommend this supplement *
By Ronald F. (Stevensville, MI) - 10/18/2016
After 28 day, taking one a day, I have not seen any improvement
  Verified Customer
Can't tell any difference *
By LARRY J W. (STOCKBRIDGE, MI) - 5/18/2019
Have been taking CircO2 for a few weeks. Every time I use a test strip it reads the same: low, if even that. Will keep taking and hope it improves.
  Verified Customer
Didn't work for me *
By Yoko M. (Canada ) - 5/11/2019
After taking it for 22 days, I haven't seen any improvement for my blood pressure at all. So disappointing since it was quite expensive.
  Verified Customer
circO2 *
By Leif S. (SAND SPRINGS, OK) - 4/26/2019
Tried your product for one month! Unable to tell that it does a darn thing for me. Return for refund!!
  Verified Customer
Still waiting for results *
By Werner M. () - 4/14/2019
May be I have enough Nitric Oxide in my cells? Can't feel a different compared to before.
  Verified Customer
CircO2 *
By Victoria C. () - 4/4/2019
I know for some people may not experience the same way way I had with CircO2. My advice was try it first by yourself before you react with peoples comments.
  Verified Customer
Circ02 *
By L K. () - 3/28/2019
Taking, cannot tell any difference and will not order any more. Do not send any.
  Verified Customer
CircO2 *
By Cleve B. () - 3/24/2019
I can't tell any effect that the nitric oxide tablets have had on me-either better or worse.
  Verified Customer
No effect from taking the product *
By John C. () - 3/20/2019
Have been taking daily and have not noticed any benefits
  Verified Customer
Circo2 *
By KENDALL C. (SAN ANTONIO, TX) - 3/4/2019
I have felt no difference at all. I will not order more of this
  Verified Customer
No longer taking it didn't do anything for me *
By Paaul F. (SUWANEE, GA) - 2/17/2019
Not a product for me. It was returned for a full refund which I received.
  Verified Customer
This product has done nothing for me *
By Cathy C. (Macon, GA) - 2/8/2019
I've taken your product as directed and no results at all.
  Verified Customer
This product did not work for me. *
By Cindy L. (Hammond, LA) - 2/8/2019
I have tried this product for 2 months and I can not see any improvements. In fact, I have lower energy levels than before I began the product. I was sure hoping it would really help me. I am pleased that it works on other people but sad it has not worked for me.
  Verified Customer
CircO2 *
By Lora B. () - 1/26/2019
I am concerned that I’ve taken 30 days worth and don’t notice much of anything. No change in my energy.