Cocoa flavanols (cocoa extract): evidence, dose and safety
Cocoa flavanols are polyphenols from the cocoa bean, mostly epicatechin and procyanidins. Most are lost when cocoa is processed into chocolate, so extracts are standardised to a measured amount.
At a glance
- Strongest evidence
- B Good
- Adult upper limit
- 500 mg a day from food and supplements together
- Safety checks
- 1 situation and 0 medicine or supplement interactions, checked against your answers in every plan
- Reviewed
- Atrum Labs clinical team (MD, PhD), November 2026
Authorised EU health claim
Cocoa flavanols help maintain the elasticity of blood vessels, which contributes to normal blood flow (beneficial effect with a daily intake of 200 mg of cocoa flavanols).
What the research looked at
Each line is one body of research, graded A (strong) to D (weak). How we grade evidence. What each study measured is explained in your personal plan.
| Grade | Who was studied | References |
|---|---|---|
| B | Healthy adults |
|
| C | Adults 60+ without heart disease |
|
How much
- Adult upper limit: 500 mg a day from food and supplements together. Source: Dose with long-term safety data: 500 mg a day for a median 3.6 years (COSMOS, Sesso HD et al. Am J Clin Nutr 2022).
- Children's doses are set by age, and some ingredients are for adults only.
Who should not take it, or should check first
- Not suitable. Concentrated cocoa extract (with some caffeine and theobromine) has not been studied in pregnancy or breastfeeding.
Products with Cocoa flavanols (cocoa extract)
Written and reviewed by the Atrum Labs clinical team (physician-scientists, MD, PhD) from our clinical knowledge base, version 0.2.0-draft. This page is general information, not medical advice. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle.
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