Used daily, this shampoo can help replenish important nutrients necessary for healthy scalp and hair. Our special formula contians Biotin, a member of the B-complex family, and Cystine, one of the most important amino acids for healthy hair growth. Cystine is an actual component of the Keratin Hair Protein. Mill Creek's Biotin Shampoo prepares hair and scalp to provide a receptive climate for Mill Creek Biotin Conditioner or Deep Conditioning Gel.