Massage as much as a pea on clean, dry skin before moisturizing. Avoid the eye area. Use sunscreen and limit sun exposure during use and one week after. Limit initial use to once every two nights during the first two weeks and then gradually increase use to once every night. WHY DO I NEED SUN PROTECTION? Products with certain ingredients, such as Retinol, can make the skin more sensitive to the sun. So when using our Rapid Renewal Retinol Treatment and other products with these ingredients, it is recommended to limit sun exposure and use Perfectionist Pro Multi-Defense UV Fluid SPF 45 before leaving the house.