Supplement · Brain health technique
Quercetin
Evidence grade: Context Dependent
A flavonol antioxidant naturally found in apples, onions, and capers, available as supplements often combined with bromelain or vitamin C for absorption. It modulates inflammation and acts as a zinc ionophore, influencing cellular stress responses.
- Practice
- Supplement
- Principle
- Nourishment
- Tactic
- Neuroprotective & Antioxidant Support
- Evidence grade
- Context Dependent
- Strength of evidence
- Medium
How to practice Quercetin
A typical supplemental dose is 250–500 mg/day with meals. Pair with vitamin C or bromelain for absorption. Focus first on dietary sources (onions, apples, capers). Avoid chronic high doses (>1 g/day) without medical supervision, as data on long-term safety are limited. Use periodically during high inflammation or allergy seasons.
The evidence behind Quercetin
Quercetin stabilizes mast cells, reduces oxidative stress, and may enhance antiviral defenses. Some small trials suggest improved endothelial function and reduced fatigue under stress, but cognitive data are limited. Bioavailability is modest; effects may depend on gut microbiome metabolism. Evidence strongest in inflammatory or allergic contexts.
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