Nail Brightening Treatment - Mellow The Yellow by Butter London is a 0.4 oz nail treatment designed to restore and brighten yellowed or discolored nails, leaving them looking fresh and healthy. This treatment works by gently neutralizing yellow tones, while providing a hydrating and nourishing effect, thanks to its vitamin-rich formula. It helps to brighten nails and restore their natural luster, making it ideal for those who want to maintain the appearance of healthy, clean nails, especially after frequent nail polish use. The light, neutral tone of the treatment gives nails a polished look, while the formula is gentle enough for daily use to maintain optimal nail health. Perfect for those seeking a non-toxic, vegan, and cruelty-free solution, this treatment helps improve the overall appearance of nails while promoting strength and hydration.