Everyone now knows how crucial Vitamin D is for you. There are hundreds of studies that show:

  • Vitamin D boosts your immune system.
  • Vitamin D regulates the amount of calcium and phosphorous in your body. So you can maintain stronger bones.
  • Vitamin D strengthens the blood cells around your retina. So you support your eyesight.
  • Vitamin D helps limit joint pain. So you can have less pain in your knees.
  • Vitamin D supports your heart. So you protect the most important muscle in your body.
  • Vitamin D plays a crucial role in keeping your body strong and full of vigor.

Why You're Not Able To Get Enough Vitamin D Every Day

Unfortunately, most people aren't getting enough Vitamin D. There are several reasons why:

First, few foods are naturally rich in Vitamin D. Fish like salmon, tuna, and mackerel top the list. And while other foods like milk, cereal and juices are fortified with Vitamin D, it's usually a scant amount — and often in the wrong form.

Second, your body makes Vitamin D when your skin is exposed to the sun. But in winter, the days are shorter, the sun is lower, and we spend more time indoors. Summer may not be any better. Many people stay inside the air conditioning to beat the heat. Plus, what are you constantly warned to do? Stay out of the sun entirely or plaster yourself with sunscreen! Sunscreen creates a barrier between your skin and the sun — preventing your body from making natural Vitamin D.

Finally, the older you get, the less efficient your body is at making Vitamin D on its own. It's no wonder that 70% of my patients that I test have a Vitamin D level that is much too low.

So what should you do?

As I mentioned to you earlier, eating Vitamin D rich foods isn't enough. In a perfect world, you could get all the Vitamin D you need from natural sunshine. But since that's not always possible, the best way to boost your Vitamin D levels is with a high-quality supplement.

Unfortunately, a lot of Vitamin D supplements on the market aren't worth the money. First of all, many brands use Vitamin D2, a synthetic form of the vitamin made in the laboratory. The natural form, Vitamin D3, is at least three times more potent than Vitamin D2. Plus, D3 is more easily used by your body.

Second, many brands come in dosages that are pitifully low. You see, the RDA for Vitamin D is only 400 IU. That was the amount recommended 50 years ago, before modern research studies were done.

These studies show that the optimum amount to take is 2,000-10,000 IU a day — dozens of times the amount of the RDA! That's the amount you need to protect your immune system, your heart, your joints, and your eyes.

It's also the amount you would get from being exposed to 15-20 minutes of sunshine in the middle of the day. Which means it's perfectly safe. In fact, studies show that you'd have to take 40,000-100,000 IU a day for several months before you experienced any negative effects.

How To Quickly Boost Your Vitamin D Levels

Fortunately, the folks at Advanced Bionutritionals have a Vitamin D3 product that meets my approval. Here's why I recommend it:

  • Each tablet from their Vitamin D3 contains 5,000 IU. So you can get a full day's worth in just a small pill.
  • Their D3 is 100% naturally sourced. It comes from lanolin found in sheep's wool. Therefore, you're getting the natural, more potent D3 instead of the weaker D2.
  • Each batch is tested for effective absorption. In fact, their tablet dissolves within 45 minutes of you taking it. So it doesn't pass through your body unabsorbed.
  • Their manufacturing process conforms with or exceeds the standards set by the US government, the Medicine Control Agency of Europe, the U.S. Pharmacopeia, and the state of California.
  • Their Vitamin D3 is lab-tested by independent third-party laboratories. So you know each batch is consistent and made to the same high standard.

As you consider all these reasons, you can see why I recommend Advanced Bionutritionals above other manufacturers. And to get you to try their Vitamin D, they're making the following generous offer:

Vitamin D3

Best Deal: Only 15 Cents/Day

Vitamin D3

One bottle containing 60 tablets of their Vitamin D3 is just $9.95 plus shipping and handling. This works out to just 28 cents a day, less than the price of a cup of coffee.

Vitamin D3

However, you can get a better deal when you order three bottles for $26.85 plus shipping and handling. You save $3.00 off the single-bottle price.

Vitamin D3

But, if you want the best price, you should get 6 bottles for $47.70 plus shipping and handling. You save $12 off the single-bottle price. That's just 15 cents a day!

Just imagine: for only a few cents a day, you can reduce pain from aching joints… keep your eyesight healthy… build stronger bones and support a strong immune system.

And regardless of which option you choose, you're not risking a single cent.

100% Guarantee

The folks at Advanced Bionutritionals are so confident you'll be delighted with their Vitamin D3 that they are offering you an amazing "down to the last pill" guarantee.

Vitamin D3 Guarantee

Order Now

You can take every last pill and if you're not delighted, simply return the empty bottles within 90 days of your purchase. You'll get all your money refunded — including shipping and handling. There'll be no questions asked. You only pay return shipping.

To make sure you're never deficient in this vital nutrient ever again, order now or call Toll Free - 1-800-791-3395 24 hours a day, seven days a week.


Janet Zand

Dr. Janet Zand, O.M.D., L.Ac

PS. I've been telling my readers for years that Vitamin D is one of the most crucial nutrients for protecting your heart, building stronger bones and supporting your immune system. If you're not getting enough sunshine every day, then taking extra Vitamin D3 is one of the most important things you can do.


"Essential for good health."

- Mona C., Vitamin D3 Customer


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Vitamin D3 Reviews

83 Reviews   |   4.7 Average Rating   |   94% Recommend This Supplement 

Assurance of quality *
By ANNE G. (Oxnard, CA) - 5/28/2024
Knowing that Advanced Bionutritionals uses only the best ingredients gives me the assurance that I'm taking a quality vitamin that's going to do the job!
  I Recommend This Supplement
  Verified Customer
Vitamin D3  *
By JOYCE R. (COMBINE, TX) - 1/16/2024
Hi, my name is Joyce Robinson and I am leaving a review for the advanced bio nutritionist vitamin D3. I have been taking vitamin D3 for several years. This is one of the best brands I’ve ever used. I don’t always have the opportunity to get outside for natural vitamin D3 but my vitamin D3 level is high, since taking this formula daily.
  I Recommend This Supplement
  Verified Customer
When Mother Nature Falls Short, We Need A Supplement *
By David B. (SEARSMONT, ME) - 1/7/2024
Living in Maine, even going out-of-doors won't necessarily give you all of the vitamin D3 that you need during the Winter months. That's why I went for the Advanced Bionutritionals Vitamin D3 supplement. The additional calcium is a plus too!
  I Recommend This Supplement
  Verified Customer
Bring in the sunshine  *
By Sandra M. (Canada ) - 1/3/2024
We all need Vitamin D and I bought this from Advanced Bionutrionals many years ago to try it out. It was great then and it's great now
  I Recommend This Supplement
  Verified Customer
Good Products *
By Barbara F. (New York, NY) - 1/2/2024
I find that all of the products I purchase from Advanced Bionutritionals are of the highest quality and all your products come with excellent product descriptions, so I know what they contain and why I am purchasing them. I feel pretty good and enjoy good health and energy levels and I attribute your products to much of the reason for this.
  I Recommend This Supplement
  Verified Customer
Vitamin D3 *
By Anne K. (United Kingdom ) - 11/10/2023
The only D3 I will continue to use. I have used other D3 with no good results. I threw them away and back to using Advanced Bionutritionals D3. Trust me. Its the best.
  I Recommend This Supplement
  Verified Customer
* Above are actual reviews from our customers. These customer’s statements may not reflect the typical purchaser’s experience and are not intended to represent or guarantee that anyone will achieve the same or similar results. The reviews should not be taken as the results a typical user will get. Your results may vary.


  • Dr. Janet Zand is compensated by Advanced Bionutritionals for her work in formulating and endorsing this product.
  • These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, cure, or prevent a disease.
Advanced Bionutritionals® products are manufactured in the USA from globally sourced ingredients by Formulation Technology, Inc.

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