I am delighted to take this supplement because the effects of its use have been visible and very positive. I realize my nails are stronger. My nails were super brittle, like a leaf, it looked like it had several layers on the nail and it was flaking one by one, especially when I was showering, washing my head or even washing dishes, I could not hit anywhere that my fingernail broke, nowadays this does not happen anymore. My hair - which is very thin at birth and because I dye it blond - is sturdier, with a little less fall. And look we're almost in the winter, when hair falls a lot more. Skin is another aspect that has improved with supplementation. My skin was well resected and dull, today it is lush, soft with luster and healthy-looking skin. Another effect that, to me, and one of the most important, was the increase in immunity. Gripes, colds, everything is gone. Another important thing: the improvement of energy. I had been watching for some time in the afternoon, just after lunch, which was not common for me. Sometimes even when she slept well she would wake up tired and indisposed early in the morning, too lazy to get out of bed. I read on the label that it helps us to extract more energy from food. And really, I believe it to be true, because I feel that I have had more energy than in other times. I take 1 tablet a day after lunch and it did not cause me stomach pain. Another important thing is that these days I took a ferritin test because I have had anemia in the past and I have to follow up, and the test gave a very high result, which I have never had before, I believe it is because of the iron present in the supplement. Well these were the main things I noticed, I want to make it clear that I'm not a hair specialist and none of that, I'm just reporting the changes that happened after I started taking the centrum. One doubt that I have seen quite a lot of women is if the Centrum gets fat, I honestly have not fed any grass since I started taking it, I think this is super myth.