Ingredient guide
Quercetin
INCI name · quercetin
In short
Quercetin is a plant flavonoid with antioxidant and calming properties that helps reduce the look of redness and uneven tone. Its delivery can be challenging, so it’s often used in specialised formulations.
Skin type
Sensitive · Oily · Combination
Best used
Anytime
What it is
Polyhydroxylated flavonol found in many vegetables and fruits; inhibits COX-1, COX-2, and 5-lipoxygenase reducing eicosanoid-mediated skin inflammation; suppresses NF-κB signalling and downstream IL-1β and TNF-α in keratinocytes; moderate tyrosinase inhibition; potent iron-chelating antioxidant; quercetin bioavailability in topical delivery is limited by lipophilicity. Nanoparticle and phospholipid complex encapsulations studied to enhance penetration; synergistic anti-inflammatory effect with niacinamide reported.
Evidence receipt
No linked study yet
No verified study is linked to this exact ingredient and route. The guidance below describes conventional use; it is not evidence of efficacy.
Where it sits
Serums sit after toner and before moisturiser. Thinnest to thickest, water before oil.
- Cleanse
- Tone
- Quercetin
- Moisturise
- SPF
Also found as
Related
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Browse product comparisonsWhere to find it
Examples, not a ranking. A product lookup can confirm identity and background; a verdict still needs the full ingredient list.
ANUA Heartleaf Quercetinol Pore Deep Cleansing Foam
Heartleaf cleanser built for daily use rather than a squeaky-clean finish.
Product discovery is not efficacy proof. These examples are not ranked by commission.
Common questions
What does quercetin do for skin?
It helps visibly calm redness, offers antioxidant support, and contributes to a more even‑looking complexion.
Is quercetin suitable for sensitive skin?
It’s generally calming, though its effectiveness depends on how well it is formulated for absorption.
How is quercetin used in skincare?
It appears in antioxidant serums and soothing treatments, often paired with liposomal or complex delivery systems.
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Personal guidance, not medical advice.