Infused with Keratin Protein oils for stronger nails Maintains nails natural moisture balance Perfect for natural or artificial nails Keratin is a strong and rich protein that is a major component to the make up of healthy skin, hair, nails, and teeth. Formed through the combination of amino acids, keratin is depleted when nails become weak and damaged. Replenishing lost keratin helps correct nail health by restoring nail strength and flexibility.