Dry or tight
Work out whether your routine is missing water, oil, or barrier support—and when persistent dryness may need medical care.
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Skin science
Barrier repair 101: what it is, how it breaks, how it heals
Stinging moisturizer, sudden sensitivity, tight flaky skin — a lot of skincare trouble is a damaged barrier. Here's what that means in plain terms, and the boring routine that heals it.
3 min read
Skin science
How the skin barrier works
Half of skincare trouble traces to one thin layer of cells and lipids. Here's the mechanism — bricks, mortar, and water loss — and why it decides what your skin can tolerate.
5 min read
Skin science
The skin barrier, and why ceramides matter
Half of skincare problems trace back to a leaky barrier. Here's what that means and what the evidence says about repairing it.
3 min read