Yellow, Stained or Ridged Nails

Fine vertical ridges are normal, and most yellowing comes from polish pigments settling into a nail that was not protected underneath. Our four-step answer: clean and exfoliate the nail and its contour, nourish the nail base so healthy nail grows through, lay a barrier under colour so pigments cannot stain, and camouflage what is already there with a brightener or a ridge filler for a smooth, natural-looking finish.