Whether you're seeing your first wrinkle or want the serious results of a retinoid without a doctor's visit, this fast-acting serum with 3 retinol technologies visibly improves key signs of aging in just 2 weeks. Gentle enough for nightly use. Murad has perfected the science of Retinol with this breakthrough serum, powered by Retinol Tri-Active Technology: a fast-acting Retinoid, a time-released Retinol, and a Retinol booster. This potent, yet gentle, formula quickly and visibly minimizes lines and deep wrinkles, firms, evens skin tone and boosts radiance for more vibrant, youthful-looking skin. This innovation balances a potent, fast-acting retinol with a time released retinol that works like a slow drip, feeding retinol gradually to minimize irritation and maximize visible results. And, a booster amplifies retinol’s ability to increase cell turnover—one of retinol’s key actions—for more youthful-looking skin, fewer fine lines, and enhanced radiance.