Retinol is extremely sensitive to light and air. That's why we put ours in a capsule--to keep light and air out and potency in. In fact, the retinol in our capsules is 76% more potent than unencapsulated retinol1. This means that highly reactive retinol is protected, ensuring the potency of every application.This luxurious, lightweight, semi-translucent serum combines two of the biggest names in skincare in one, easy-to-use capsule: Retinol, the clinically proven wrinkle-smoother, and moisture-boosting ceramides. Formulated to help protect against the dryness often associated with retinol. In one month, see more youthful skin, minimized wrinkles and better texture and tone.