Ceramides

Best for: dry, sensitive, reactive or barrier-compromised skin that loses moisture too easily.

Ceramides are the lipids that make up roughly half of your skin's outer barrier. When ceramide levels drop — from over-exfoliation, harsh cleansers, age or weather — skin feels tight, looks dull and reacts to everything. Topical ceramides help refill the barrier so moisture stays in and irritants stay out.