Oral nail growth supplements: a comprehensive review.

As the cosmeceutical market for nail products is growing, there is an emerging need for dermatologists to provide patients with evidence-based information regarding over-the-counter products and supplements for nail growth. By law, there is no required efficacy and safety assessment by the Food and Drug Administration prior to these products being made available to consumers. This carries financial and health consequences for patients seeking affordable and effective over-the-counter products to improve their nail conditions. In this comprehensive review, we discuss available oral nail growth products, their mechanisms of action, and side effects.