What it is: An iconic retinol serum, now powered by four unique retinoids, that slows the visible signs of skin aging. Skin Type: Normal, Dry, Combination, and Oily Highlighted Ingredients: - Four Time Active Retinoid Technology: Powerful retinoid complex supports gentle, accelerated skin renewal. - Four Collagen Amino Acids and Antioxidants: Hyaluronic acid boosts hydration while supporting firmer, radiant skin. - Four Types of Hyaluronic Acid: Small-to-large weights boost hydration and offset dryness. Ingredient Callouts: Free of parabens, formaldehydes, phthalates, mineral oil, oxybenzone, sulfates SLS & SLES, and contains less than one percent synthetic fragrance. It is also cruelty-free. What Else You Need to Know: Inspired by the latest discoveries in skin longevity science, the Retinol Youth Renewal Serum is now powered by four-times Active Retinoid Technology to address the visible signs of early skin aging: an encapsulated retinol for quick, intense, stable, and targeted delivery, a gentle yet fast-acting retinol, a stabilized retinoid with barrier-nourishing omega-6, and a soothing, nourishing bio-retinoid booster to offset retinol’s potential for irritation. Clinical Results: Results based on a 4-week clinical study with 30 participants, after 7 days: - Clinically proven to improve the 10 visible signs of aging like fine lines, wrinkles, uneven tone, dullness, dehydration, rough texture, and firmness, elasticity, discoloration, skin clarity, pore size, and skin barrier resilience In 14 days: - 100% showed visible improvements in elasticity and firmness In 28 days: - 100% showed measurable improvement in all 10 visible signs of healthy, thriving skin