Once Daily Supplement for Strong, Healthy, Beautiful Nails® The #1 dermatologist recommended product for strengthening nails. Twelve week supply. Appearex® is formulated with 2.5 mg of biotin, an ingredient clinically proven to improve nail quality. One Appearex® tablet daily. Stimulates healthy nail growth and smoothes brittle ridges. Increases nail strength. Produces firmer, healthier nails in 3 to 6 months.