Appearex

The biotin in Appearex® stimulates epidermal cells and affects the protein structure called keratin found in skin, nails, and hair. Biotin is directly involved in the production of keratin cells and is believed to increase the quantity of keratin-matrix proteins in the nail. Used regularly, Appearex improves nail quality making your nails stronger, healthy and beautiful.
 
Clinical studies have demonstrated that daily use of 2.5 mg of biotin, the active ingredient in Appearex®, can strengthen and improve the quality of brittle nails.