Blueberry
Useful mainly for adults wanting vascular and cognitive support from sustained anthocyanin intake.
Quick decision guide
May help most
Adults wanting vascular and cognitive support from sustained anthocyanin intake
Common dosing range
150–300 g/day whole fruit, or 500–1,000 mg/day standardized extract
When to expect effects
Weeks of sustained intake
Watch out for
High-dose extracts may have a mild antiplatelet effect
What is it
Blueberries (Vaccinium species) are berries rich in anthocyanins, proanthocyanidins, chlorogenic acid, and vitamin C. Supplements use whole-fruit powders, juice concentrates, or standardized extracts.
Is it worth it for you?
Use this as a quick fit check, not a diagnosis.
Worth considering if…
Probably skip if…
Evidence at a glance
| Goal | Effect | Best fit | Time |
|---|---|---|---|
vascular function and blood pressure Limited Evidence | Small (a few mmHg; improved flow-mediated dilation) | Adults with elevated blood pressure or cardiometabolic risk | Weeks |
cognitive function in older adults Limited Evidence | Modest | Older adults, including those with early memory decline | Weeks |
glycemic control Limited Evidence | Small | Adults with insulin resistance or elevated glucose | Weeks |
vascular function and blood pressure
- Effect
- Small (a few mmHg; improved flow-mediated dilation)
- Best fit
- Adults with elevated blood pressure or cardiometabolic risk
- Time
- Weeks
cognitive function in older adults
- Effect
- Modest
- Best fit
- Older adults, including those with early memory decline
- Time
- Weeks
glycemic control
- Effect
- Small
- Best fit
- Adults with insulin resistance or elevated glucose
- Time
- Weeks
Evidence for 3 uses
AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.
vascular function and blood pressure
Biomarker supportBlueberry anthocyanins are metabolized into phenolics that improve nitric-oxide-mediated endothelial function. RCTs show improved flow-mediated dilation and small reductions in blood pressure with sustained intake. These are vascular biomarkers; cardiovascular-event reduction has not been demonstrated.
Bottom line: Improves vascular biomarkers and modestly lowers blood pressure, without proven hard-outcome benefit.
cognitive function in older adults
Supplement benefitRCTs of blueberry powder or extract in older adults report modest improvements in memory and executive function, plausibly via improved cerebral blood flow and BDNF-related signaling. Effects are modest and trials are relatively small, but several are positive.
Bottom line: Modestly supports cognition in older adults across several positive but small trials.
glycemic control
Biomarker supportSome trials report small improvements in insulin sensitivity or fasting glucose with blueberry intake. Results are inconsistent and the effect, where present, is on glucose biomarkers rather than diabetes outcomes.
Bottom line: May produce small glucose-marker improvements, but evidence is limited and mixed.
Evidence is mixed
Glycemic outcomes vary across trials, with several showing no significant change.
How it works
How to take it
What to track
2 commercial forms
Compare the main delivery options and what they’re best suited for.
Fresh or frozen blueberries
Preferred whole-food source.
Whole-food matrix.
Blueberry powder / extract
Used in trials when fresh fruit is impractical.
Concentrated anthocyanins.
Safety
Know the common side effects, key cautions, and who should avoid it.
Common side effects
Who should avoid it
- People on anticoagulants using high-dose extracts (caution)
Pregnancy & breastfeeding
Safe as a food; no concerns at dietary intake.
Interactions
High-dose extracts may modestly affect anticoagulation
Food sources
| Food | Amount | %DV |
|---|---|---|
| Fresh blueberries (1 cup) | ~85 kcal, ~14 mg vitamin C, ~100-300 mg anthocyanins | — |
Fresh blueberries (1 cup)
- Amount
- ~85 kcal, ~14 mg vitamin C, ~100-300 mg anthocyanins
- %DV
- —
Choosing a product
What to look for on the label — and what to be skeptical of.
Look for…
Be skeptical of…
Frequently asked questions
How many blueberries per day?⌄
Most RCTs use 1-2 cups/day or equivalent extract.
Are wild blueberries better?⌄
Lowbush wild blueberries have higher anthocyanin content per gram than cultivated, but both are beneficial.
References by claim
Track Blueberry with Pilora
Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.
Coming to App StoreDisclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.