Antioxidant

Quercetin

Quercetin — one of the most common flavonoids in nature. A powerful antioxidant, anti-inflammatory component, and stabilizer of vitamin C. Found in onions, apples, and green tea.

antioxidantanti-inflammatoryflavonoidstabilizer C

✓ Safe

Comedogenic Rating

0/5

Irritation Potential

0/5

What is it?

Quercetin (3,3',4',5,7-pentahydroxyflavone) — a flavonoid found in onions, apples, capers, and green tea. INCI: Quercetin. MW 302 Da. Practically insoluble in water — often used in cosmetics in the form of liposomes or cyclodextrin complexes to enhance bioavailability. Concentration: 0.01–1%.

Antioxidant serums and products for sensitive skin. A synergist of vitamin C — prolongs its stability in formulations. Effective in products for redness and reactive skin.

Key Benefits

✦

Powerful antioxidant and UV protection

Quercetin absorbs UV rays (especially UVA) and neutralizes free radicals. Protects cell DNA from photodamage. Synergistic with vitamins C and E — together they form a powerful antioxidant complex.

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Anti-inflammatory and antihistamine action

Quercetin inhibits the release of histamine from mast cells — reduces redness and skin reactivity. Suppresses pro-inflammatory cytokines (IL-1β, TNF-α). Effective in atopic dermatitis and rosacea.

✧

Stabilizer of vitamin C in formulations

Quercetin protects ascorbic acid from oxidation in formulations, prolonging the active life of vitamin C. Therefore, they are often combined in one serum. Additionally enhances each other's antioxidant effect.

Suitable for

sensitive skinredness-prone skinall skin typesskin with rosacea

Main Actions

✓ antioxidant protection✓ reduction of inflammation and redness✓ synergy with vitamin C

Quercetin vs Kaempferol vs Rutin

All three — flavonoids with similar structures. Quercetin is the most studied and effective in cosmetics. Rutin — more water-soluble, better for strengthening capillaries. Kaempferol — less anti-inflammatory, more antibacterial. In most formulations, quercetin is used as the gold standard of flavonoids.

CategoryAntioxidants

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