A proprietary ingredient development from Dr. Murad and his team of experts. 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.