This results-boosting serum is enriched with climbazole, a proven retinol booster. Climbazole helps block the enzyme that breaks down retinoic acid, leaving a reservoir of retinoic acid in the skin. This prolongs and enhances the anti-aging effects without causing any additional irritation. Retinol can cause some irritation when first introduced into a skincare regimen. Timed Release Technology, found in all Medik8 vitamin A products, helps minimize irritation while maximizing visible results. Our Intelligent Retinol Serum protects the retinol in a polymer reservoir, which essentially functions as a protective shield between the retinol and the skin. The polymer reservoir slows the rate at which retinol is able to penetrate the skin, allowing the active to penetrate smoothly throughout the night. Squalene is a skin-identical oil that glides effortlessly across the skin's natural barrier, providing the complexion with overnight hydration and helping to integrate retinol into your skincare routine. Being a water-free formulation, we've ensured the stability of the powerful yet fragile retinol molecule. How to use: After cleansing at night, apply 4 drops to the face, neck, and décolletage. Follow with your usual Medik8 moisturizer. We recommend Advanced Night Restore, designed to be used after vitamin A. Apply retinol gradually. Use twice a week for the first two weeks, every other night for the next two, and then every night thereafter. Consult a doctor if breastfeeding or pregnant. You should always use sunscreen in the morning while using vitamin A. It is recommended to do a patch test before use. Ingredients: Retinol The classic form of vitamin A helps boost collagen levels and improve your skin’s natural regeneration cycle, leaving it looking smooth, even, and youthful. Climbazole Climbazole is proven to enhance the activity of retinoids in the skin to deliver the potency of higher percentages without the irritation. Squalene Squalene, a natural emollient, helps restore your skin’s natural defense barrier and deeply hydrates the skin. Vitamin E Vitamin E, an oil-soluble antioxidant, can quench free radicals in the skin while stabilizing the retinol for optimal potency. NO ARTIFICIAL FRAGRANCES NO PARABENS SUITABLE FOR VEGANS ZIPPER FOUNDATION NO SYNTHETIC COLORS NO PHTHALATES ALCOHOL FREE NOT TESTED ON ANIMALS