What is the recommended dosage for Quercetin?

General: 500-1,000 mg/day; Immune Support: 500-1,500 mg/day

What are the side effects of Quercetin?

Potential side effects include: Headache, Tingling in extremities, Gastrointestinal discomfort, Low oral bioavailability (addressed by phytosome formulations).

What is quercetin and how does it support the immune system?

Quercetin is a flavonoid found in onions, apples, and berries. It has been studied for its antioxidant and anti-inflammatory properties, including its ability to inhibit pro-inflammatory cytokines and stabilize mast cells involved in allergic immune responses.

What dosage of quercetin has been studied for immune health?

Clinical trials have used quercetin at doses of 500–1,000 mg per day, often co-administered with vitamin C or bromelain to enhance absorption. Study durations range from 2 to 12 weeks depending on the outcome measured.

What are the potential side effects of quercetin?

Quercetin is generally well tolerated at doses up to 1,000 mg per day. High doses may cause headache, tingling, and gastrointestinal discomfort. Quercetin may interact with certain antibiotics and cyclosporine by affecting drug metabolism.

Quercetin
Quercetin

antioxidant

También conocido como: Quercetin Dihydrate, Isoquercetin, Quercetin Phytosome

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About

Quercetin is a flavonol polyphenol with antioxidant, anti-inflammatory, and immunomodulatory properties. It inhibits mast cell degranulation and histamine release, modulates NF-kB and NLRP3 inflammasome pathways, and may act as a zinc ionophore to enhance intracellular zinc uptake. GRAS-designated by the FDA.

How It Works

Flavonol polyphenol that inhibits mast cell degranulation and histamine release; modulates NF-kB and NLRP3 inflammasome pathways; may support zinc ionophore activity to enhance intracellular zinc uptake.

Evidence For Conditions

Condición	Calificación	Estudios	Participantes
Allergic Rhinitis	C	5	400	Ver →

Side Effects

Headache
Tingling in extremities
Gastrointestinal discomfort
Low oral bioavailability (addressed by phytosome formulations)

Drug & Supplement Interactions

Cyclosporine (may increase drug levels)
Fluoroquinolone antibiotics (may interfere with bacterial target)
CYP3A4 and CYP2C8 substrates (may inhibit metabolism)

Informe siempre a su profesional de salud sobre todos los suplementos que toma.Siempre informe a su profesional de salud sobre todos los suplementos que toma.

Related Ingredients

Curcumin Glutathione Astaxanthin Resveratrol

Datos rápidos

Dosificación: General: 500-1,000 mg/day; Immune_Support: 500-1,500 mg/day
Formas: capsule tablet powder
Fuentes naturales: Onions, Apples, Berries, Capers, Broccoli, Red wine, Green tea
Límite superior: No established UL; GRAS up to 500 mg/day per FDA
Mejor momento: With meals (fat-containing meals improve absorption); often paired with vitamin C or bromelain for enhanced bioavailability

Resumen de evidencia

Allergic Rhinitis C

Aviso legal FDA: Estas declaraciones no han sido evaluadas por la Food and Drug Administration. Los productos y la información en este sitio web no están destinados a diagnosticar, tratar, curar ni prevenir ninguna enfermedad. Las calificaciones de evidencia presentadas se basan en nuestro análisis de investigación publicada revisada por pares y no constituyen consejo médico. Siempre consulte a su profesional de salud antes de comenzar cualquier régimen de suplementos.