Antioxidant
Quercetin Dihydrate (from Sophora japonica bud extract)
Also known as: quercetin, quercetin dihydrate, sophora quercetin
A plant-derived bioflavonoid extracted from Sophora japonica buds with potent antioxidant and anti-inflammatory properties. Quercetin is one of the most abundant flavonoids in plant foods.
Primary uses
- Antioxidant support
- Anti-inflammatory response
- Seasonal allergy support
- Immune modulation
How it works
- Mast cell stabilization
- Quercetin may reduce histamine release
- Free radical scavenging
- NF-κB pathway modulation
Dosage
- Typical range
- 250–1000 mg daily, often split into 2–3 doses
- Timing
- With meals for improved absorption
- With food
- With food; bioavailability enhanced by fat or quercetin transporters
- Duration
- Safe for continuous use; effects may accumulate over weeks
- Special populations
- Generally safe; those on blood thinners should monitor with healthcare provider
Forms
- powder· 70/100
- capsule· 70/100
- dihydrate· 70/100
Safety
Common side effects
- Rare; headache or stomach upset at high doses
Contraindications
- Caution with anticoagulant/antiplatelet medications
Evidence notes
Good evidence for antioxidant and anti-inflammatory effects; moderate evidence for seasonal allergy support. Bioavailability improved with dihydrate form.
Grade B: Some human trials support key claims; further confirmation needed.
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