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The ingredient, explained

Quercetin

A primary study examines this ingredient in the specified preparation and setting.

AntioxidantSkin conditioning
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Ingredient guide

What it is and what it does

4H-1-Benzopyran-4-one, 2--3‚4-dihydroxyphenyl--3‚5,7-trihydroxy-

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.
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) ↗

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 topical treatment study

Combination hydrogel reduced diabetic lower-limb wound-healing time versus hyaluronic-acid treatment.

What this does not tell us

Mixture and special delivery system; medical wounds after unsuccessful compression, not healthy-skin cosmetic benefit. No isolated quercetin effect.

Sources for this summary. PubMed 31876118 ↗

Research review checked Oct 1, 2026

Bounded review of local candidates, exact-name indexed primary journal/PubMed safety and topical searches; not a systematic review.

Ingredient research is not proof that a product containing this ingredient works.

Read the 1 selected study

Follow the formula

Products containing this ingredient

All 7 products ↗

From the wider catalogue. Linked by the ingredient list, without an efficacy ranking.

Names and identifiers

Registry identity

4H-1-Benzopyran-4-one, 2--3‚4-dihydroxyphenyl--3‚5,7-trihydroxy-

INCI name on ingredient lists
QUERCETIN
CAS registry number
117-39-5
EC number
204-187-1

Sources for this ingredient record