Alpha-Glucan is a polysaccharide (glucose polymer) derived from natural sources such as fungi or fermentation, used in skincare to hydrate, support the skin barrier, and act as a prebiotic that promotes a balanced skin microbiome. It also imparts soothing and film-forming properties to formulations.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient irritation or redness | Rare | Generally well tolerated; minor irritation possible in sensitive individuals. |
Contact allergic reaction | Very rare | Allergy to polysaccharides is uncommon but theoretically possible. |
Sticky or tacky skin feel | Uncommon | Cosmetic sensory effect related to humectant film, not a medical adverse event. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.