I started using this line of products when I found out that I was not absorbing iron very well. Apparently I never did, but the doctors never found out until I started bleeding very heavily for weeks at the time and not making the blood fast enough! I was put on iron supplements for a while but they didn't work! The only solution was to get iron by infusion at the hospital! I did it for a while, then I decided I didn't want to keep going to the hospital and stay a few hours while they infuse me. I said, “There has to be an easier way out there!” I began looking online and that's when I discovered this line of products. I'm so glad now, because come to find out iron was not the only thing I was not absorbing! But the doctors would not do anything about it so I decided to do something about it myself. I take the Zetpil Multivitamin w/ iron and Seratone, which within days quieted my mind, let me sleep and reduced my worrying about everything (for which the doctors had given me everything in the book and still I saw no results). I also introduced to the Zetpil Brain Booster which has helped me get more motivated, happier and returned my libido. I can't tell you how much I appreciate these products. I have only been on most of them a month and a half, but I can already feel improvements, including my hands and feet are no longer cold and I'm not getting out breath all the time anymore! I got blood work done after about a month and a half of being on the Multi-vitamin and Mineral with Iron and I am so happy with the results! My blood count went up as much as it did in six visits to the hospital for iron infusions! Can you believe it? I have great hopes for the future now. If you're someone who has tried supplements by mouth and saw no results, these are definitely the products for you, especially if you're looking for fast results. I like the idea that I'm not losing most the supplement through digestion! These products go right into your blood stream and the concentration of the ingredients are very high, which I believe that is the reason why I started feeling better so quickly!