Exfoliant
Gluconolactone
Also: Polyhydroxy Acid · PHA
A polyhydroxy acid (PHA) that resurfaces skin without the sting or photosensitivity of glycolic acid.
What it is
A naturally-occurring polyhydroxy acid derived from gluconic acid. Structurally larger than the alpha-hydroxy acids (glycolic, lactic) most exfoliating toners use, which means it cannot penetrate as deeply — and that is exactly the point.
How it works
Loosens the bonds between dead skin cells on the surface, allowing them to slough off cleanly. Because the molecule is larger than glycolic acid, it works above the basal layer only — no deep penetration, no sun sensitisation, minimal sting on application. The trade-off is that it works more gradually than AHAs; that is appropriate for daily use, particularly under Pakistani sun.
Who it is for
Sensitive or sensitised skin that reacts to glycolic, lactic, or mandelic acid. Anyone introducing exfoliation for the first time. Daytime AM use under SPF.
What to watch for
Even though PHA is gentle, you still need broad-spectrum SPF in the daytime. Skin renewal accelerated by any exfoliant (AHA, BHA, PHA) reveals fresh cells more vulnerable to UV damage.
Found in