It is universally known that B vitamins are extremely important for physical and mental health. Let’s take a closer look at one of them. Biotin (also known as vitamin B7 or vitamin H) is much more than a product that strengthens hair and nails. Check out what kind of problems may occur by too low of an amount of this ingredient, how to supplement any shortages, and which supplement to choose in case natural sources of biotin are not enough for yo