What does vitamin B7 (biotin) do in the body?

Neal Spruce
Neal Spruce on behalf of dotFIT
Vitamin B7, also known as biotin, is a cofactor (necessary substance to activate molecules/enzymes) in many different enzyme systems necessary for energy production, cell growth, production of fatty acids, and the metabolism of fats and amino acids. It plays a primary role in all of our cells’ energy production by being an integral player in the citric acid cycle where biochemical energy is generated as we breathe. Full biotin deficiency is rare because in healthy persons our intestinal bacteria produce it in excess of the body's daily requirements, which are only about 30-100 mcg.

For anyone marginally deficient, as some populations can be, such as athletes maintaining low body fat, active dieters, and pregnant women, a daily multivitamin and mineral formula (MVM) containing 100-300 mcg (higher end for active people) of biotin can adequately fill the gap.
Your body uses vitamin B7 (biotin) from food or supplements to metabolize sugar and fat and turn them into energy; it also supports your nervous system. A B7 deficiency is rare and is characterized by brittle nails and hair and skin rashes.

Continue Learning about Vitamins



In the United States, the Food and Drug Administration (FDA) regulates vitamin supplements and provides recommended daily amount information. The FDA says that we should pay attention when considering vitamin supplements, because ...

frequently many different vitamins and minerals are combined into one product.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.