Vitamin C wearing a sugar coat — very stable, gentler, and slower-acting than the pure form.
A glucose group shields the fragile part of vitamin C until skin enzymes (alpha-glucosidase) clip it off, releasing ascorbic acid gradually. Stability and tolerability are excellent; the open question is how much converts, with estimates ranging widely.
Brightening signal in small combination trials
Small studies (often 2% ascorbyl glucoside, frequently combined with niacinamide) show gradual improvement in spots and tone over 8–12 weeks. Direct head-to-head data against pure vitamin C is missing.
Anchored to regulatory assessments — not hazard lists. Dose makes the poison; these are the conclusions at real-world cosmetic use.
CIR concluded ascorbyl glucoside is safe in current practices of use.
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