Gluconolactone
Gluconolactone — a polyhydroxy acid (PHA) derived from glucose that gently exfoliates the skin's surface while attracting and holding water. Its larger molecular size means it penetrates more slowly than traditional alpha-hydroxy acids, making it a milder option often chosen for sensitive or reactive skin.
Key points
- Gluconolactone is classified as a polyhydroxy acid, a next-generation relative of alpha-hydroxy acids like glycolic and lactic acid.
- Its larger molecular structure limits deep penetration, which is associated with less stinging and irritation than smaller AHAs.
- It also acts as a humectant, binding moisture to help support the skin barrier while it exfoliates.
- Gluconolactone offers mild antioxidant activity and is frequently paired with other PHAs such as lactobionic acid.
Frequently asked
Is gluconolactone suitable for sensitive skin?
Its large molecular size slows penetration and generally causes less irritation than glycolic or lactic acid, which is why it is often selected for sensitive or easily reactive skin. As with any exfoliant, patch testing first is a sensible precaution.
Does gluconolactone increase sun sensitivity?
Exfoliating acids can make skin more responsive to UV light, so daily broad-spectrum sunscreen is recommended when using gluconolactone. Some data suggest PHAs are gentler in this respect than traditional AHAs, but sun protection is still advised.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
