Ceramides are lipids that make up over 50% of the skin barrier. A 3:1:1 ratio of ceramides, cholesterol, and fatty acids mirrors the barrier's own composition — replenishing what cleansing, age, and actives deplete.
Clinical moisturizer research shows ratio-balanced ceramide complexes restore barrier function measurably faster than plain occlusives.
How to use: Evening, after actives; also excellent layered over serums on sensitive nights.
Cautions: Universally tolerated — the safest heavy-lifter in any routine.