Fast-acting serum with 3 retinol technologies visibly improves key signs of aging in just 2 weeks. Gentle enough for nightly use. It's clinically proven: Users in a single-blind study reported visible improvement in the 5 key signs of aging: Fewer lines and wrinkles, skin that looks firmer, feels smoother, and is more even-toned with a boosted glow (after 4 weeks) Retinol can be notoriously drying. Murad's Retinol Tri-Active Technology and hydrating hyaluronic acid make it gentle enough to use nightly without sacrificing any of the benefits Why Retinol Tri-Active Technology? Dermatologists know: The most effective retinol is so gentle that you'll want to use it daily. Only Murad has smart retinol technology that balances a fast-acting retinoid, delayed-release retinol and a retinol booster for rapid results while still being gentle on skin, plus a dose of hydrating hyaluronic acid so common retinol issues like dryness are practically a non-issue. Which skin type is it good for? Oily Balanced Combination Dry Sensitive Key Ingredients: Retinol Tri-Active Technology: Quickly and visibly minimizes lines and wrinkles, evens skin tone and boosts radiance. Swertia flower extract: Helps increase skin’s resilience and improve the look of youthful contours. Hyaluronic acid: Hydrates to visibly plump and minimize dryness | Murad Retinol Youth Renewal Serum DLX , 5 ml | Dermstore