Does Raw Cacao Lower Blood Pressure? What the Science Actually Shows

Cacao has become the internet's favorite "healthy chocolate." The claim going around: raw cacao lowers blood pressure. Is it true? Mostly yes — but the drop is small, and the "raw" part matters far less than you have been told.

📋 Simple Summary

Cacao is the plant that chocolate comes from. Raw cacao is the bean before it is roasted. The claim is that eating it lowers blood pressure.

Here is what the science shows. Cacao contains natural compounds called flavanols. Flavanols help your blood vessels relax and widen. That does lower blood pressure a little — the best studies put the drop at about 2 to 3 points on the top number.

But here is the honest part. That drop is small. It is about the same as eating less salt or taking a short walk. And the "raw" label is mostly marketing — what actually matters is how many flavanols are left in the cacao, not whether the word "raw" is on the bag.

So the answer is: mostly true, but modest. Cacao can help your blood pressure a little. It is not a medicine.

The detailed breakdown continues below for those who want the full science.

🥈 Evidence Tier: Silver

This is one of the better-supported claims about chocolate. Many human trials and at least three big reviews — including a Cochrane review, the gold standard for "does this actually work" — back it up. But the effect is small, and almost no studies tested "raw cacao" as a specific product. Most used cocoa extract or dark chocolate.

The short answer

Yes, cacao lowers blood pressure — but only a little, and "raw" is not the magic part.

On this one, the science is actually clear. Cocoa flavanols relax blood vessels, which lowers blood pressure by a small amount. The effect is real and repeated across studies. It is just not dramatic.

First, the simple words

Cacao is the plant and the raw bean. Cocoa is what you get after the bean is roasted and processed. Chocolate is cocoa mixed with sugar and fat.

"Raw cacao" means the bean was not roasted, or was only lightly heated. This matters for one reason: roasting, and a chemical step called "Dutching" (treating cocoa with alkali to make it taste milder), destroy the flavanols. Dutching can strip away up to 90% of them.

So raw cacao tends to be higher in flavanols. That is why it got the "healthy chocolate" reputation. But here is the key point: what lowers your blood pressure is the flavanols, not the word "raw." A raw cacao product that is still heavily processed or low in flavanols would not help much. A high-flavanol dark chocolate (70% cocoa or more) would help just the same.

What the best studies actually found

• The 2025 big review. Researchers pooled 145 human trials with over 5,200 people. People taking flavanols from cocoa, tea, and fruit — about 586 mg a day — saw their blood pressure drop by about 2.8 points on the top number and 2.0 on the bottom number. Real, but small.
• The Cochrane review. Cochrane reviews are the gold standard for "does this actually work." Their review found cocoa and chocolate lower blood pressure — mainly in people whose blood pressure is already high or borderline high.
• The famous dark chocolate study (2007). In one well-known trial, 44 older adults with borderline-high blood pressure ate a tiny 6.3-gram square of dark chocolate (about 30 calories) every day for 18 weeks. Their blood pressure went down — and they did not gain weight. The point: you do not need much.
• The catch from the giant trial. The biggest cocoa trial ever (COSMOS, 21,442 people, 3.6 years) found cocoa extract did not clearly reduce heart attacks and strokes. So cacao lowers blood pressure a little, but that small drop did not turn into fewer heart events in the largest test.

The honest catches

• The effect is small. About 2 to 3 points. Across a whole population that matters. For one person, it is not a treatment. If you have high blood pressure, cacao is not a stand-in for your doctor or your medicine.
• Not all chocolate helps. Milk chocolate and most candy have almost no flavanols and a lot of sugar. Only high-flavanol cacao or dark chocolate (70% cocoa or higher) does the job.
• "Raw" is mostly marketing. My own search for human trials on "raw cacao" and blood pressure came back essentially empty — the evidence is about flavanols in general, not the raw label. What counts is the flavanol content.

Our Take

This claim is mostly true, and it is one of the few chocolate health claims that holds up. Cacao — and high-flavanol dark chocolate — does lower blood pressure a little, and the evidence is solid: a Cochrane review, plus a 2025 analysis of 145 trials. But the drop is small, and the "raw" part is marketing. The flavanols are what matter, not whether the bean was roasted. If you want the benefit, pick high-flavanol cacao or 70%+ dark chocolate, keep the portion small, and do not expect it to replace your blood pressure medicine.

❓ Common Questions About Cacao and Blood Pressure

The Bottom Line

Does raw cacao lower blood pressure? Yes — a little, and the "raw" part is not the secret. Cacao flavanols relax blood vessels and lower blood pressure by about 2 to 3 points. That is real and well-supported, from a Cochrane review to a 2025 analysis of 145 trials. But the effect is small, and what matters is the flavanol content — not whether the label says "raw." Choose high-flavanol cacao or 70%+ dark chocolate in small amounts. Evidence tier: 🥈 Silver.

⚠️ Medical Disclaimer: We are researchers, not doctors. Nothing on this page is medical advice. Cacao is not a treatment for high blood pressure. Talk to your doctor before changing your diet or medication, especially if you have high blood pressure or a heart condition.

Sources

1. Ried K, et al. Effect of cocoa on blood pressure. Cochrane Database of Systematic Reviews. 2017. PMID: 28439881
2. Lagou V, et al. Impact of flavan-3-ols on blood pressure and endothelial function in diverse populations: a systematic review and meta-analysis. European Journal of Preventive Cardiology. 2025. PMID: 40126033
3. Taubert D, et al. Effects of low habitual cocoa intake on blood pressure and bioactive nitric oxide: a randomized controlled trial. JAMA. 2007. PMID: 17609490
4. Arisi TOP, et al. Effects of Cocoa Consumption on Cardiometabolic Risk Markers: Meta-Analysis of Randomized Controlled Trials. Nutrients. 2024. PMID: 38931273
5. Dicks L, et al. Effect of an (−)-Epicatechin Intake on Cardiometabolic Parameters — A Systematic Review of Randomized Controlled Trials. Nutrients. 2022. PMID: 36364762
6. Sesso HD, et al. Effect of cocoa flavanol supplementation for the prevention of cardiovascular disease events: the COcoa Supplement and Multivitamin Outcomes Study (COSMOS). American Journal of Clinical Nutrition. 2022. PMID: 35294962