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Short articles, checked against dermatology sources we actually read. Each one ends with what is not known, and a list of where every claim comes from.
How much sunscreen is enough? The two-finger rule, checked
Labels assume a thick layer. Most of us put on a third to a half of it. Here is where the two-finger rule comes from and how far it can be trusted.
Starting retinol: a schedule that respects your skin
Retinol is slow, and irritation is common when you rush it. What the dermatology sources say, and the schedule we suggest.
AHA or BHA? What each acid actually does
Both loosen dead surface cells. One is water-soluble, one is oil-soluble, and both change how you handle the sun.
Ceramides and the skin barrier, without the hype
Bricks and mortar, three lipids in roughly equal parts, and what a moisturiser can and cannot do.
Niacinamide, hyaluronic acid and vitamin C: what the studies support
Three popular serum ingredients, at the strengths and times the research used. Most of it is small and industry-funded, so we say so.
How we write these
We only state a fact if we read it on the page we cite, and we say when we could not check something. Where the research is small, short or paid for by the industry, the article says so. We do not claim any product treats, cures or prevents a condition, which is also what NPRA's guideline for cosmetic claims requires.
This is general information, not medical advice. If you have a skin condition, see a doctor or dermatologist.