Biotin also known as vitamin H is a water-soluble B-vitamin, specifically referred to as vitamin B-7. Biotin serves as a coenzyme in the human body, which means it assists in carrying out necessary biochemical processes like carbohydrate and fatty acid metabolism. All B vitamins help the body to convert food (carbohydrates) into fuel (glucose), which is used to produce energy. These B vitamins, often referred to as B complex vitamins, also help the body metabolize fats and protein. B complex vitamins are needed for healthy skin, hair, eyes and liver. They also help the nervous system function properly.
Our body needs biotin to metabolize carbohydrates, fats and amino acids, the building blocks of protein. Biotin is often recommended for strengthening hair and nails, and it's found in many cosmetic products for hair and skin. Because it is water soluble the body does not store it.