Flavonoid
Quercetin (Immune)
Also known as: Quercetin dihydrate, Isoquercetin, Quercetin phytosome
B
Evidence
Flavonoid with broad antiviral activity, zinc ionophore function, and anti-inflammatory properties.
Primary uses
- Antiviral
- Anti-inflammatory
- Zinc ionophore
- Allergy relief
How it works
- Helps zinc enter cells (ionophore)
- Inhibits viral replication enzymes
- Anti-inflammatory effects
- Mast cell stabilization
Dosage
- Typical range
- 500-1000mg 2-3x daily
- Timing
- With meals and zinc
- With food
- Yes, enhances absorption
- Duration
- During illness or ongoing for allergies
- Special populations
- Those seeking antiviral or allergy support
Forms
- Quercetin phytosome
- Quercetin dihydrate
- Isoquercetin
- With bromelain
Safety
Common side effects
- GI upset
- Headache
Contraindications
- Kidney disease (high doses)
Evidence notes
Promising research for viral infections
Grade B: Some human trials support key claims; further confirmation needed.
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