Discover No.8 Stay Clear, our smoothing booster with Propionic Acid. This booster limits the production of melanin whilst also enhances cellular vitality and slows down photo-ageing to give a smoother, healthier, and more even complexion. The Stay Clear booster enhances cellular activity and slows down photo-aging to give a smoother, healthier, and more even complexion. Additional Vitamin E helps to reduce the effects of aging.