Anthocyanins

Confidence

research strength

BBuilding confidence7172 studies referenced

Latest evidence update: 2026-02-28

Strongest in Consistency (89). Held back by Recency (39).

Study quality (37%)

Study design (21%)

Risk of bias (16%)

Solid mix of RCTs with some methodological gaps.

Replication (26%)

Cross-study replication (21%)

Precision (5%)

Confirmed across many independent studies with significant findings.

Sample size (16%)

Thousands of participants across the literature.

Consistency (11%)

Studies agree on direction of effect.

Recency (10%)

Evidence base skews older; field may have moved on.

Effect by outcome

how big the change is

Effect-size tagged on 120 of 143 claims for this supplement. Our research updates daily; remaining claims are pending re-processing.

Directional evidence

Areas where research points to a consistent direction of effect. The strength of evidence is graded; the size of the effect is not quantified.

Common dosage

Varies

Description

Flavonoid pigments giving berries, red cabbage, and dark grapes their color. Evidence for endothelial function, cognitive function, and oxidative stress markers.

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Referenced studies (72)

ProtocolEngine provides general health information based on published research. This is not medical advice. Consult a healthcare professional before starting any supplement or health protocol.