Dark knuckle whitening serum lighten melanin reduce knee ankle dullness skin brighten smooth beauty moisturizing nourish body care joint darkening serum product features:exfoliate, remove melanin, improve dullness, yellowing enhance luster, powerful whitening ability, maintain fairness, make your skin fair and shuny naturally extracted leaving you with a beautiful skin tone niacinamide effectively reduces dullness and brightens skin tone glycerin has the effect of moisturizing and nourishing the skin allantoin can soften keratin elastic and smooth skin