THORNE
Quercetin Phytosome
79/100
SUPPIE SCORE
60/100
EFFICACY
High
SAFETY
86/100
CLEANLINESS
What Does Quercetin Phytosome Do?
Provides a phospholipid-bound quercetin complex designed for enhanced absorption, useful for mild blood pressure support and seasonal respiratory comfort, though clinical trials remain small.
How does quercetin phytosome compare to standard quercetin?
Can I take quercetin phytosome with prescription medications?
Should I take this with meals or on an empty stomach?
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What Are the Benefits of Quercetin Phytosome?
Based on proven scientific research
Blood pressure reductionMild
Seasonal respiratory and allergy comfortMild
Antioxidant cellular defenseMild
Good For:
What Are the Side Effects of THORNE Quercetin Phytosome?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•Pre-existing renal impairment: high or enhanced-absorption quercetin metabolites may exacerbate nephrotoxicity
•Ciclosporin therapy: quercetin alters CYP3A4 and P-glycoprotein transport, shifting narrow-window blood levels
•CYP3A4 and P-gp substrate interactions: phytosome formulation increases absorption and may unpredictably alter levels of narrow-margin drugs; check with a prescriber.
•Stop and get advice if: unexplained flank pain, reduced urination, or swelling in lower extremities
•Stop and get advice if: severe persistent headache or unusual tingling sensations in hands or feet
Potential Side Effects
Negative Interactions
Inactive Ingredients
Quercetin phytosome (quercetin, emulsifier (sunflower lecithin))
Low RiskL-leucine
Low RiskBulking agent (microcrystalline cellulose)
Low RiskCapsule shell (hydroxypropyl methyl cellulose)
Low RiskMaltodextrin
Low RiskAnti-caking agent (silicon dioxide)
Low RiskWhat Are the Ingredients in THORNE Quercetin Phytosome?
Quercetin Phytosome
250 mg
Providing Quercetin
85 mg
L-Leucine
100 mg
Quercetin Phytosome (Quercetin, Emulsifier (Sunflower Lecithin))
Bulking agent (Microcrystalline Cellulose)
Capsule Shell (Hydroxypropyl Methyl Cellulose)
Maltodextrin
Anti-caking Agent (Silicon Dioxide)
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Dosage & Bioavailability
How the active doses and forms in Quercetin Phytosome compare to the research.
•Quercetin Phytosome — 500-750 mg a day; within the 500-1,000 mg/day used in studies.
•Providing Quercetin — 170-255 mg a day; below the 500-1,000 mg/day studied range.
•L-Leucine — 200-300 mg a day; below the 2.5-7.5 g/day studied range.
Sources & References
Frequently Asked Questions
Common questions about THORNE Quercetin Phytosome