The complete intensive In & Out care routine to smooth ridges, even out the surface, and regenerate the nail plate in 3 weeks. Aging, vitamin deficiencies, overexposure to water or chemicals... Ridges and imperfections in the nails can result from various causes. It is essential to provide targeted care for ridged nails to achieve a unified surface, protect the nail plate in the long term, and restore its natural shine. With its double In & Out action, this targeted ridged nails routine addresses the main causes of ridges, both topically on the nail surface and from within for healthy regrowth. A true concentrate of vitamins, minerals, hydrating and nourishing active ingredients, it corrects the aesthetic flaws of ridged nails while meeting their essential nutritional needs for lasting results.