Ingredient guide

Sorted by what they do. Each entry says how strong the evidence is and who should steer clear.

Alpha hydroxy acid (AHA)

Antibacterial

Antioxidant

Barrier lipid

Beta hydroxy acid (BHA)

Botanical / soothing

Botanical fragrance

Dicarboxylic acid

Emollient

Humectant

Humectant / keratolytic

Humectant / soothing

Mineral UV filter

Retinoid

Retinoid (prescription)

Sensory additive

Signalling

Vasoconstrictor

Vitamin