Biotin

* A water soluble vitamin naturally found in food. Also known as Coenzyme R, Vitamin B7 or Vitamin H.

Functions:

Mainly used for its moisturizing and smoothing properties. It's believed to improve the texture in creams, and also add shine, manageability and body to the hair. Because Biotin is a necessary component to the growth and formation of cells, fatty acids and fats, a deficiency of the vitamin often leads to heart problems, skin rash and hair loss. For this reason, many believe that is has the ability to encourage hair growth. In actuality, not one scientific study has yet to prove this particular function, and topical application of Biotin is most likely ineffective considering the fact that it cannot penetrate the skin. Thus far, studies have mostly demonstrated its ability to make the hair more pliable and easy to comb. If looking to treat hair loss, a much better alternative to topical application would be a oral supplement (although even the benefits to biotin supplements remain unclear). Despite the fact that no current research supports the efficacy of this ingredient with regards to skin and hair care, you can still find it in a variety of products such as hair grooming gel, conditioner, shampoo and moisturizer.

Recommended Products w/Biotin:

Marini Lash Eyelash Growth Enhancer ($150), IT Cosmetics Brow Power Perfector ($24)