Does biotin prevent hair loss?

As of 2015, there is insufficient evidence to show that taking biotin or vitamin H orally prevents or reduces hair loss. However, there is strong evidence to show that a biotin deficiency causes hair thinning, hair color loss, hallucinations, depression, and rashes on the eyes, nose and mouth.

Biotin is a B-complex vitamin that helps the body to metabolize carbohydrates and fats and maintain the proper function of the nervous system. Since it affects hormone function, it is essential for maintaining good skin health. Although biotin is said to regulate blood sugar when combined with chromium, strengthen nails and reduce low-density lipoprotein levels, there is insufficient evidence to prove its effectiveness.