The ingredient, explained

Arbutin

An ingredient studied in a multi-ingredient cream for epidermal melasma.

AntioxidantTyrosinase inhibitor / brighteningBleachingSkin conditioning

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Ingredient guide

What it is and what it does

4-Hydroxyphenyl-beta-D-glucopyranoside

About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗

Antioxidant: Limits oxidation, including deterioration of formulation ingredients. This label alone does not show a clinical antioxidant effect in skin.
Tyrosinase inhibitor / brightening: Research category for changes in pigmentation or uneven skin tone. The label does not establish that a finished product changes pigmentation.
Bleaching: A technical role associated with lightening hair or skin.
Skin conditioning: A broad cosmetic role for maintaining skin condition. It does not identify a particular clinical benefit.

Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗ · Original niacinamide study: Pigmentation and hyperpigmented spots ↗

Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.

A closer look

What the research shows

Human research on a combination

An open-label, single-arm study reported lower melasma scores after use of a cream with 3% arbutin, 4% nicotinamide, 1% bisabolol and 0.05% retinaldehyde.

What this does not tell us

There was no comparison group, and the abstract does not report sample size, duration or the arbutin isomer. The contribution of arbutin is unknown. This citation must not be assigned to alpha-arbutin or deoxyarbutin.

Sources for this summary. PubMed 26682557 ↗

Research review checked Sep 30, 2026

Selected primary sources were reviewed for the existing research brief on 30 September 2026, with exact ingredient, route and combination limitations recorded. This was a bounded editorial review, not a systematic search.