An advanced-strength retinoid serum from Sunday Riley, featuring an innovative formula with a 6.5% solution of stabilized retinoid blends and botanical, retinol-alternative extracts into the skin. Combining 5% retinoid ester blend, 1% liposomal-encapsulated retinol blend, and 0.5% blue-green algae with natural, retinoid-alternative activity, this serum fights the signs of aging and improves the look of congested and UV damaged skin. Paired with natural ingredients like Hawaiian white honey and cactus extract to give the skin a calm, more even-toned complexion. This retinoid serum targets a wide array of skin concerns, making it great for retinoid beginners and devotees. * 1 fl oz. * Formulated for all skin types * Cruelty-Free, Sulfate-Free, Paraben-Free, Gluten-Free, Soy-Free * Phthalate-Free, Fragrance-Free Vegetarian **Ingredients:** Apply 1-2 pumps in the evening to clean, dry skin. For Sunday Riley's targeted instructions, see below: For new retinoid users:Use two days on, two day