Optimal health of skin, hair, and nails is dependent upon adequate daily intake of key nutrients that supply the assurance of radiant health. This product contains essential vitamins that are necessary for the generation of hair, nails, and skin. It also contains biotin, MSM, L-Cysteine, and Paba. 
 
** This Product is Collagen Free **
 
References:
Beneficial Effects of a Sulfur-Containing Supplement on Hair and Nail Condition
 
L-Cystine-Containing Hair-Growth Formulation Supports Protection, Viability, and Proliferation of Keratinocytes