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.