Your skin feels tight, almost like it’s a size too small. A splash of lukewarm water stings, your favorite gentle moisturizer vanishes into a dry desert of a face within minutes, and no amount of highlighter can fake the radiance you used to have. If your complexion looks flaky, feels perpetually irritated, or reacts to products that used to be your holy grail, you aren’t just dealing with dry skin—you are likely dealing with a compromised skin barrier.

Think of your outermost layer of skin, the stratum corneum, as a brick-and-mortar wall. Your skin cells are the bricks, and the lipids—made up of ceramides, cholesterol, and fatty acids—are the mortar holding everything together. When that mortar chips away due to over-exfoliation, harsh weather, or aggressive ingredients, moisture leaks out, and irritants march right in.

The good news? The skin is remarkably resilient. When you stop breaking it down and start …