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Evidence-based skincare

Plain-language explainers, each grounded in the study behind the claim. We cite our sources and stick to what the research actually measured.

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Humectants pull water in, occlusives keep it there — most stubborn dryness is a missing half of that pair, or a barrier problem.

Dry-skin routine templates Hyaluronic acid Ceramides Glycerin

Skin barrier
Barrier repair 101: what it is, how it breaks, how it heals
Stinging moisturizer, sudden sensitivity, tight flaky skin — half of skincare trouble is a damaged barrier. What that means physically, and the boring routine that fixes it.
June 20, 20263 min readUpdated Jul 2026
Skin barrier
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.
June 14, 20262 min readUpdated Jun 2026