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What’s actually in the bottle.

The ingredient encyclopedia: what each active does, how strong the evidence really is, the strength worth paying for, what to pair it with (and what not to) — plus every product we review that features it.

Retinoids

4

Antioxidants

4

Brighteners

5

Exfoliants & acne actives

8

Hydrators

7

Barrier & repair

9

UV filters

3

Botanicals & ferments

5

Hair & scalp

7

Top-left: products we review that feature it. Top-right: evidence dots. Ingredient guides are educational, not medical advice — patch-test, and ask a dermatologist about prescription options.

How we grade evidence

Proof, not promises.

  • Strong evidence

    Several controlled human studies agree, and dermatology bodies recognise the effect.

  • Moderate evidence

    Promising human studies, but fewer, smaller or brand-funded — results vary.

  • Emerging evidence

    Early, lab or small-scale research. Interesting, not proven.