A severe biotin deficiency, indicated by rashes and hair loss, is rare; however, some researchers think that a mild biotin deficiency may be more common than once believed—especially among women. As part of the support system for a range of metabolic processes, it is a small but important part of complete nutrition. In addition, biotin has been shown to improve hair growth and nail strength, reduce blood sugar in people with diabetes, and support healthy pregnancy and lactation (with a physician’s guidance.)
