I'm already using this product for about 30 days, and I've already started to notice the difference in my nail and hair. My hair falls too much and it does not grow, now it is falling very little, besides my nails that are stronger and stopped of flaking. This product is a gum with a wonderful taste, which makes you want to eat it all. I will certainly buy again, not to mention the great service of the company and delivery that was 15 days, very fast. I'm delighted. Congratulations evitmins, I will definitely recommend the site.