Regular consumption of dark-fleshed fruits such as grapes, berries, and blueberries may offer cardiovascular benefits, according to a recent analysis conducted by researchers from the United Kingdom and Spain. The study examined 17 systematic reviews and meta-analyses alongside 20 randomized controlled trials published since 2015, exploring the effects of these fruits on various markers of heart health.

The findings suggest that naturally occurring compounds in these fruits, particularly polyphenols, are linked to modest but consistent improvements in cardiovascular risk factors. These improvements notably include enhanced blood vessel function, as well as positive effects on blood pressure, inflammation, and cholesterol levels.

One of the highlighted studies within the analysis reported that daily consumption of 150 grams of blueberries—roughly the amount found in a typical supermarket punnet—over a six-month period significantly improved blood vessel function. This is a key factor in maintaining efficient blood flow throughout the body. While the trial did not directly measure incidents of heart attacks or strokes, the vascular improvements were estimated to correlate with a 12 to 15 percent reduction in cardiovascular disease risk.

The research underscores the potential of polyphenols, plant-based compounds known to mitigate inflammation, enhance vascular function, and provide protection against oxidative stress, as a mechanism behind the observed health benefits. Such effects were particularly pronounced among individuals with elevated cardiovascular risk profiles, including those who are overweight or obese, exhibit high cholesterol, have raised blood pressure, or present other metabolic risk factors.

Cardiovascular disease, encompassing conditions such as coronary heart disease, heart failure, and stroke, remains a major public health challenge. In the United Kingdom alone, it affects over seven million people and accounts for approximately one in four deaths.

The study’s authors conclude that promoting the consumption of dark-fleshed fruits like grapes and blueberries could represent a practical and evidence-based approach to supporting cardiovascular health amid increasing rates of obesity and heart disease. They advocate for greater public awareness of the role these fruits may play as part of a heart-healthy diet.

The review was published in the journal Nutrients.