VitaTress BiotinShampoo by Nexxus. Nexxus VitaTress Biotin Shampoo - is a conditioning cleanser especially formulated for the problems related to fine, fragile, and thinning hair. VitaTress Biotin Shampoo is a vital component of the VitaTress Hair Revitalization program for fragile, thinning hair. The program features a comprehensive collection of proactive formulations including nutritional VitaTress Hair Food Dietary Supplement to promote full, voluminous, and healthy hair.