Cocoa and heart health study in plain language
In a recent 2025 large randomised trial published in Hypertension, researchers followed 8,905 older adults (average age around 71 years) who were free of hypertension at baseline. They consumed a cocoa-extract supplement (500 mg/day flavanols, 80 mg epicatechin) or placebo, over a median of 3.4 years.
The findings revealed that overall, there was no significant reduction in incident hypertension in the full group (hazard ratio [HR] ≈ 0.96). However, in the subgroup whose systolic blood pressure (SBP) at baseline was less than 120 mmHg, cocoa extract did reduce incident hypertension (HR ≈ 0.76, i.e., ~24% lower) versus placebo.
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The effect emerged starting around year 2 of follow-up in that subgroup. In short, cocoa flavanols may help prevent the onset of high blood pressure, especially in those who are still in the “normal” range, rather than treating established hypertension.
Why this matters for your lifestyle
Flavanol-rich cocoa has the potential to support healthy vascular health, especially when consumed early on. If your blood pressure remains within the normal range, incorporating cocoa that is rich in flavanols into your diet might assist in maintaining that stability. However, it is important to keep in mind that this is not a cure-all solution, as the supplement did not show significant reductions in risk for every individual. Therefore, its effectiveness is maximized when it is part of a more comprehensive healthy lifestyle that includes a balanced diet, regular exercise, and adequate sleep. Moreover, when we take a long-term perspective, the beneficial effects of such habits became evident only after two years, highlighting that consistent, healthy practices are far more significant than seeking quick fixes.
How to apply it: Smart cocoa habits
- Choose dark chocolate or cocoa products high in flavanols: Check for high cocoa percentage and minimal processing.
- Limit added sugar: Treat it as a heart–healthy treat, not a free-for-all.
- Combine with other good habits: Regular physical activity, a balanced diet, good sleep and stress management.
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According to the researchers, if you have normal blood pressure (SBP < 120 mmHg), you are in the zone where cocoa flavanols may offer preventive benefit but if you already have high blood pressure, cocoa is not a substitute for medical treatment instead, it may fit as a companion strategy.
Takeaway
This study shows that prevention matters and that the window when you are still healthy is when you should build strong habits. “One square of dark chocolate” won’t fix high blood pressure overnight but choosing flavanol-rich cocoa as part of a consistent, heart-smart lifestyle just might help keep your blood vessels healthier for longer. If you are looking for a simple, enjoyable habit that supports your heart and your taste buds then cocoa flavanols could be your delicious ally.
Note: The information provided in this article is for educational purposes only and is not intended as medical advice. Always consult with a qualified healthcare professional before starting any new medication or treatment and before changing your diet or supplement regimen.