Press & Glow (Travel Size)

Gluconolactone at 5.5% — a polyhydroxy acid, in a 30ml bottle. Larger molecules than glycolic, so it exfoliates slowly.

Gluconolactone at 5.5%. It is a polyhydroxy acid — the molecule is larger than glycolic or lactic, so it moves through the surface more slowly and exfoliates more gradually. That is the whole reason to choose a PHA over an AHA.

Formulated for twice-daily use, which is unusual for an exfoliant and is a consequence of the acid rather than a claim about the product. If you already use an acid serum or a Vitamin A at night, once a day is likely enough.

Made for most skin states, including skin that has found glycolic or lactic acid too much. Press onto a pad and sweep, avoiding the eye area.

Thirty millilitres. The same formula as the full-size bottle — a size that travels, or that lets you find out whether it suits you before committing to a full one.

Actives: Gluconolactone (PHA, exfoliant) 5.5%

Suits: Most skin states, including skin that found glycolic or lactic too much.

Not for: Skin that is currently broken or stinging. Little point alongside another daily acid.