Cardiologists Reveal Another Health Benefit of Dark Chocolate

For many, few things are more comforting than a hot cup of tea paired with a piece of chocolate—and now, new research suggests this combination may also offer surprising health benefits.

A YouGov survey of 5,182 U.S. adults found that nearly half of Americans (49 percent) prefer milk chocolate, while 34 percent opt for dark chocolate.

But those preferences might shift with growing awareness that dark chocolate could help lower blood pressure and support cardiovascular health.

The research, published in the European Journal of Preventive Cardiology, analyzed data from 145 randomized controlled trials.

It found that regular consumption of flavan-3-ols—naturally occurring compounds in tea, apples, cocoa, and dark chocolate—can lead to meaningful reductions in blood pressure, particularly in individuals with elevated or high readings.

In some cases, the effects were comparable to those achieved by certain medications. However, it isn't a replacement for prescribed drugs or medical advice.

Professor Christian Heiss, the study's lead author from the University of Surrey, told Newsweek: "While dark chocolate can be a source of flavan-3-ols which are compounds shown to support blood vessel function and reduce blood pressure it is important to consume it mindfully and as part of and not instead of a healthy balanced diet.

"Many commercially available chocolates are also high in sugar, fat, and calories, which can offset potential benefits if eaten in excess. Also the composition and amount of flavan-3-ols can differ considerably and is seldomly clearly stated on the package."

For people with elevated blood pressure, Heiss recommends small amounts of high-cocoa-content dark chocolate (typically at least 70 percent cocoa)—or, better still, cocoa powder—can be incorporated in a healthy balanced diet.

"A portion of around 20–30 grams per day, or a few squares, is a reasonable amount," he said. "Alternatively two to three table spoons of non-alkalized cocoa powder in milk can replace a latte.

"It's also worth noting that the health benefits observed in studies typically relate to consistent, long-term intake rather than large single servings. Working with your doctor and measuring blood pressure at home is the best way to see the effect."

According to the Centers for Disease Control and Prevention (CDC), nearly half of adults in the U.S. have high blood pressure—a major risk factor for heart disease and stroke, two of the leading causes of death in the country. While dark chocolate may offer some help, it certainly isn't a quick fix.

The CDC recommends adopting a healthy lifestyle that includes a balanced diet, maintaining a healthy weight, avoiding smoking, limiting alcohol, exercising regularly and getting sufficient sleep.

Beyond lowering blood pressure, flavan-3-ols were also shown to improve the function of the endothelium—the inner lining of blood vessels—which plays a crucial role in heart and vascular health. Interestingly, this benefit was observed even when blood pressure remained unchanged, suggesting a broader positive impact on the circulatory system.

Heiss said: "The findings are encouraging for those looking for accessible ways to manage their blood pressure and support their heart health through enjoyable dietary changes.

"Incorporating small amounts of commonly consumed foods like tea, apples, dark chocolate, or cocoa powder into a daily balanced diet could provide beneficial amounts of flavan-3-ols."

So, the next time you reach for a cup of tea and a square of dark chocolate, you might just be giving your heart a little love.