MetaNail Serum Pro is a topical formulation combining 20 organic and essential nutrients to repair, rejuvenate, and improve nail health . It can fight fungus and brittle or cracked nails. The serum is easy to apply and safer than most oral and topical nail products. According to the official website, MetaNail Serum Pro is designed to offer superior and long-lasting results. It can enhance nail and foot health without giving users any adverse side effects. The 20-in-1 formula has clean and effective ingredients.