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Gluconolactone in skincare
Ultra-gentle PHA exfoliant with built-in humectancy and chelating action. Safe for rosacea and sensitive skin.
One of very few exfoliants safe for BOTH AM and PM. Its large molecular size means negligible UV photosensitization. A major advantage over AHAs like glycolic or lactic acid. In AM, suitable in toners or serums even under SPF without the sun-sensitivity risk of AHAs. In PM, gently promotes overnight cell renewal. Safe for twice-daily use even on rosacea, eczema-prone, or post-procedure skin.
What it is
Gluconolactone is a Polyhydroxy Acid (PHA). A third-generation hydroxy acid with a significantly larger molecular structure than glycolic acid or lactic acid. This larger size dramatically slows skin penetration, producing gentle, non-irritating exfoliation even in highly sensitive skin types such as rosacea, atopic dermatitis, and post-procedure recovery. Mechanism: like all hydroxy acids, it disrupts corneodesmosomes (the protein bonds between dead skin cells), promoting controlled desquamation, improved texture, and mild brightening. Additionally, gluconolactone is a: (1) Humectant. Its multiple hydroxyl groups bind water, hydrating the SC as it exfoliates; (2) Chelating agent. Binds pro-oxidant metal ions (Fe²⁺, Cu²⁺) in the skin, providing antioxidant protection; (3) Antioxidant. Scavenges free radicals independently. Clinical studies confirm efficacy for improving skin texture, pore appearance, and mild hyperpigmentation without the irritation of AHAs, and without meaningful photosensitization. Making it one of the few exfoliants with a credible case for AM use. Concentrations up to 30% exist in professional home-peel systems, but the standard safe maximum for daily leave-on consumer products is 15%. Ideal for skin types that cannot tolerate glycolic or lactic acid.
The facts
| Category | PHA (Polyhydroxy Acid) |
| Typical use | Morning and evening |
| Concentration YARAI treats as a full dose | 15% |
Why the amount matters, not just the presence
Most ingredient checkers tell you whether something is in the bottle. That is a smaller question than it sounds. Gluconolactone at 15% and gluconolactone at a trace level are not the same ingredient in any way that affects your skin.
An ingredient list is ordered by quantity, so position carries real information. YARAI reads that position and scores accordingly, which is why the same ingredient can land differently in two different products.
The honest limit: a list gives order, not percentages. Estimating concentration from position is an estimate. It is a better estimate than ignoring position, and it is still an estimate. We would rather tell you that than let a number look more certain than it is.
Common questions
What does gluconolactone do in a skincare product?
Ultra-gentle PHA exfoliant with built-in humectancy and chelating action. Safe for rosacea and sensitive skin.
How much gluconolactone should a product contain?
YARAI treats 15% as a full dose for this ingredient. Below that, the ingredient is present but is scored as contributing less. An ingredient list gives you the order of ingredients, not their percentages, so this is an estimate read from position rather than a measurement.
When should I use gluconolactone?
One of very few exfoliants safe for BOTH AM and PM. Its large molecular size means negligible UV photosensitization. A major advantage over AHAs like glycolic or lactic acid. In AM, suitable in toners or serums even under SPF without the sun-sensitivity risk of AHAs. In PM, gently promotes overnight cell renewal. Safe for twice-daily use even on rosacea, eczema-prone, or post-procedure skin.
Check your own products
Point your camera at a product. YARAI identifies it from the label, finds that product's full ingredient list from published sources, and scores it. No barcode and no box needed, which is how it handles imported and small-brand products.
Concern level, category and thresholds on this page are read directly from the same data the YARAI app scores with, so this page and the app cannot disagree. EU figures cite Regulation (EC) No 1223/2009. Last built 2026-09-09. Nothing here is medical advice.