Swanson
Quercetin
83/100
SUPPIE SCORE
68/100
EFFICACY
High
SAFETY
90/100
CLEANLINESS
What Does Quercetin Do?
Swanson Quercetin provides 475 mg of quercetin dihydrate per single-capsule serving, aligning closely with standard 500 mg clinical trial protocols.
Should I take this quercetin capsule with a meal that contains healthy fats to maximize absorption?
Can 475 mg of quercetin interact with prescription blood thinners or blood pressure medications?
How does quercetin dihydrate compare in bioavailability to specialized phytosome forms?
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What Are the Benefits of Quercetin?
Based on proven scientific research
Antioxidant SupportStrong
Immune FunctionModerate
Inflammatory ResponseModerate
Cardiovascular FunctionMild
Good For:
What Are the Side Effects of Swanson Quercetin?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•Clinical trials using oral quercetin up to 1,000 mg daily for up to 12 weeks demonstrate good general tolerability with low rates of adverse events.
•Mild gastrointestinal discomfort, headache, or tingling sensations are occasionally reported, particularly at higher supplemental intakes.
•Quercetin can inhibit cytochrome P450 enzymes (such as CYP3A4 and CYP2C9) and P-glycoprotein, potentially altering blood levels of medications such as warfarin, cyclosporine, and digoxin.
•Individuals with preexisting renal impairment should use caution, as very high supplemental doses have been associated with nephrotoxic risk in animal models.
•Safety during pregnancy and lactation has not been established in clinical studies, so supplemental doses beyond normal dietary intake should be avoided.
Potential Side Effects
Negative Interactions
Inactive Ingredients
Vegan capsule (hypromellose)
Low RiskMicrocrystalline cellulose (plant fiber)
Low RiskMagnesium stearate
Low RiskSilica
Low RiskWhat Are the Ingredients in Swanson Quercetin?
Quercetin (from quercetin dihydrate)
475mg
Vegan capsule (hypromellose)
microcrystalline cellulose (plant fiber)
magnesium stearate
silica
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Dosage & Bioavailability
How the active doses and forms in Quercetin compare to the research.
•Quercetin (from quercetin dihydrate) — 475 mg per serving; within the 500-1,000 mg/day used in studies.
Sources & References
No sources available
Frequently Asked Questions
Common questions about Swanson Quercetin