Sunday Riley A+ High-Dose Retinoid Serum Limited Edition Kit in Beauty: NA. Miracle in a bottle: Sunday Riley's A+ High-Dose Retinoid Serum. 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. Encapsulated CoQ10 helps to improve the appearance of aging or damaged skin, while rare, Hawaiian White Honey, Bisabolol, Cactus Extract, and Ginger balance and soothe the skin for the appearance of a calmer, even-toned complexion. Includes travel-friendly versions of Sunday Riley C.E.O. Glow and Good Genes Lactic Acid Treatment.. Suitable for all skin types. Cruelty-free, vegan, and free of sulfates, parabens, phthalates, fragrance, gluten, and soy. In a independent blinded study of 102 women over four weeks, 90% saw boosted skin radiance and agreed the product was gentler than other face retinoid serums used in the past. 38 ml total. Apply 1-2 pumps in the evening to dry, clean skin. For new retinoid users: use two days on, two days off during morning and night, then follow with a hydrating oil or moisturizer and AHA serum. For advanced retinoid users: use daily in the evenings, then follow with a hydrating oil or moisturizer and AHA serum. SRIL-WU27. SR100. Bold formulations, innovative technology, instant results - that's what Sunday Riley stands for. Every product reflects Sunday's belief that in order for results to count, they have to be visible and fast. Each Sunday Riley product is a powerful, targeted treatment designed to visibly improve the quality of your skin, including the signs of aging, dryness, oiliness, acne, dehydration, and the appearance of pores and discoloration. Each high-tech, carefully crafted formula delivers instant results with long term payoff, for truly game changing skincare.