ISDIN Si-Nails is an innovative nail growth formula that has been clinically proven to strengthen brittle nails by increasing thickness, density, and durability of the nail and cuticle. Visible results in just 14 days.
Apply nail repair serum to the nail and cuticle, covering the nail edges. Apply in vertical strokes across the entire nail surface. Apply underneath the nail. Repeat steps 1-3 for each nail the treatment is applied to.