Cocoa and its effects on heart and blood vessel health
What it found
Regular cocoa intake was linked to lower blood pressure, better insulin response, and improved blood vessel and platelet function in people.
The authors suggest these changes may help protect the heart.
What they found
Studies in people
Blood pressure and insulin
Recent research in people found that cocoa lowered blood pressure and improved how the body handles insulin.
Blood vessels and platelets
Studies in people showed cocoa improved the way blood vessels work and how platelets behave.
Other findings
How cocoa might work
Scientists have suggested several ways cocoa could help the heart. These include boosting nitric oxide, acting as an antioxidant, and reducing inflammation. These ideas are still being debated.
What the authors conclude
- They summarize the current evidence linking cocoa to better heart and blood vessel health.
- They outline possible ways cocoa might produce these benefits in the body.
- They highlight what these findings could mean for people who eat cocoa.
How it was done
Population studies show that eating plant foods regularly lowers the chance of heart disease and stroke. Scientists wanted to see if cocoa might be one reason for this benefit.
The authors gathered and summarized existing research on how cocoa affects the heart and blood vessels. They also looked at proposed ways cocoa might work inside the body. No new experiments were run for this summary.
What it can’t tell you
- We summarised it from the abstract only.
- This is a summary of many studies rather than a single controlled trial. It can show links but cannot prove cocoa directly causes these benefits.
- Some proposed ways cocoa works in the body are still debated among scientists.
Who paid
- Authors work at
- University Hospital, Switzerland
The paper
- Title
- Cocoa and cardiovascular health
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people
- Summarised from
- Abstract only
- Cite
- Corti R, Flammer AJ, Hollenberg NK, Lüscher TF (2009). Cocoa and cardiovascular health. Circulation. doi:10.1161/CIRCULATIONAHA.108.827022PubMed 19289648DOI
Summary written 30 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error