Biotin 10mg is a water-soluble B vitamin and an important component of enzymes in the body that convert fats and carbohydrates to energy. Supporting healthy skin, hair, and nail proteins is one of the best known biotin benefits.* Some preliminary evidence suggests that taking a biotin supplement may help promote healthy hair and increase nail thickness in those with brittle nails.* Pregnancy, diabetes, smoking and alcohol exposure may increase risk of biotin deficiency. Vital Nutrients Biotin capsules provide 10,000 mcg of biotin.