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Ingredient guide
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.
Reviewed against published evidence · editorially independent · no brand pays for placement
Works for
Redness · Tone
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.
Also found as
Related
Common questions
It helps visibly calm redness, offers antioxidant support, and contributes to a more even‑looking complexion.
It’s generally calming, though its effectiveness depends on how well it is formulated for absorption.
It appears in antioxidant serums and soothing treatments, often paired with liposomal or complex delivery systems.
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Personal guidance only · For clinical concerns, see a dermatologist.