Get healthier looking nails with the Sally Hansen Nailgrowth Miracle Serum, designed to remedy and treat worn, frail nails. The exclusive Protein Complex prompts fast, effective nail growth, whilst the inclusion of Soy Protein, Collagen and keratin helps strengthen and lengthen nails without brittleness. The rub-on applicator allows the serum to be diligently applied to cuticles and the skin closest to the nail-edge, providing a fuller, richer healing process. C.