Appearex is the brand for every woman strives for strong, feminine, beautiful natural nails. And the key to achieving these dramatic results is biotin, the active ingredient in Appearex. This once-daily vitamin supplement stimulates epidermal cells and strengthens keratinthe protein structure found in skin, nails and hair. A sufficient supply of biotin will promote increased production of keratin cells and can also enhance the keratin-matrix proteins in the nail.