Hair Growth in stock Products Description What is best biotin capsules? Biotin is one of the B vitamins, also known as vitamin H, vitamin B7, coenzyme R (Coenzyme R) and so on. Biotin is a member of the water-soluble vitamin B group. It is abundant in liver, kidney, yeast, and milk, and is an important factor for organisms to fix carbon dioxide. It is easy to combine with one of the proteins in...