epicatechin

Phytochemical

What is it

Epicatechin is a flavanol found in cocoa, dark chocolate, tea, and many fruits. It is studied primarily for cardiovascular, metabolic, and muscle effects.

Evidence for 2 uses

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Endothelial function/blood pressure

Strong Evidence

Strong evidence that cocoa flavanols improve flow-mediated dilation and modestly lower blood pressure.

Muscle adaptation

Mixed Evidence

Preclinical promise; human trials are small and inconsistent.

How it works

Epicatechin enhances endothelial nitric oxide signaling, improving vasodilation and flow-mediated dilation. It also influences mitochondrial biogenesis pathways and may modulate myostatin signaling in muscle. Cocoa flavanol trials show consistent improvements in vascular function and modest reductions in blood pressure. Muscle-building effects shown in mice have been harder to replicate in humans.

Dosage

No RDA. Trials use 25-200 mg of epicatechin per day, often delivered through cocoa flavanol extracts providing 200-900 mg total flavanols.

When and how to take it

Effects on endothelial function appear within 1-2 hours of acute intake; daily intake provides cumulative benefits.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Cocoa flavanol extract

Best-studied delivery form.

Mix of flavanols.

Purified (-)-epicatechin

Used in sport supplements.

Predictable dose.

Safety

Well tolerated as part of cocoa and chocolate intake. Isolated high-dose epicatechin has limited long-term safety data.

Who should be cautious

Pregnancy: dietary intake is fine; concentrated supplements have limited data.

Interactions

Theoretical additive effect with antihypertensives and antiplatelet drugs. No major clinical drug interactions documented.

Food sources

Dark chocolate (70%+), 30 g

Amount
~25-60 mg epicatechin
%DV
—

Green tea, 1 cup

Amount
~5-20 mg epicatechin
%DV
—

Frequently asked questions

Will epicatechin build muscle?⌄

Preclinical findings are intriguing, but human evidence is too inconsistent to recommend it for muscle gain.

Is chocolate a good source?⌄

Dark chocolate (70%+ cocoa) provides epicatechin and other flavanols in meaningful amounts.

References

epicatechin on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on epicatechin (PubMed search) — PubMed link

Track epicatechin with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

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Evidence-based·How we grade evidence

Disclaimer: 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.