Supplement · Brain health technique
Flavonols
Evidence grade: Context Dependent
A subclass of flavonoids found in foods like cocoa, tea, apples, onions, and berries. Flavonol supplements (e.g., quercetin, kaempferol) provide concentrated polyphenols thought to improve vascular and antioxidant function.
- Practice
- Supplement
- Principle
- Nourishment
- Tactic
- Neuroprotective & Antioxidant Support
- Evidence grade
- Context Dependent
- Strength of evidence
- Medium
- Cost
- High
- Effort
- Low
- Time commitment
- Low
How to practice Flavonols
Focus first on dietary sources, tea, berries, apples, cocoa. If supplementing, typical quercetin dose is 250–500 mg/day. Take with food to improve tolerance. Choose standardized extracts and avoid “mega doses.” Useful during high stress or inflammation periods but unnecessary with a plant-rich diet.
The evidence behind Flavonols
Flavonols enhance endothelial nitric oxide, improving blood flow and reducing oxidative stress. Cohort studies link higher dietary flavonol intake to slower cognitive decline and lower dementia risk. Small RCTs show improved memory and attention from cocoa flavonols. Supplement evidence is mixed, benefits appear when diet is poor or vascular health is compromised. Excess doses may cause GI upset or interact with medications.
More Supplement techniques
Take control of your brain health
BetterBrain gives you a personalized protocol of techniques like these, backed by science and tailored to you.