Biotin helps hair grow faster. Hair is made from keratin, which is a type of protein. Biotin enhances keratin's structure and aids in promoting general scalp health, which is vital for hair growth.
Lack of biotin can cause hair loss and thin, brittle or splitting hair. Biotin, or vitamin H, is one of the B-complex vitamins. It can be found naturally in nuts (such as peanuts and almonds), legumes, egg yolk, soybeans, bananas and mushrooms. Biotin deficiency is abnormal due to the small amount of biotin required and various foods containing biotin. Consuming too many processed foods that lack biotin can pose an issue. A healthy adult should take 30 micrograms of biotin per day, according to the Institute of Medicine.