Red grapes and blueberries may help protect heart health, study suggests

Regular consumption of red grapes and blueberries may contribute to cardiovascular health, according to research led by José Abellán-Alemán, a professor at the Catholic University of San Antonio of Murcia (UCAM) in Spain.

The study, published in the scientific journal Nutrients, attributes some of the potential benefits to polyphenols, natural compounds found in red, purple and blue fruits that have antioxidant and anti-inflammatory properties.

Researchers point to compounds such as resveratrol and anthocyanins, which may help regulate blood pressure and improve certain cholesterol and inflammation markers, particularly among people with existing cardiovascular risk factors.

In the case of grapes, the research highlights red-fleshed varieties, including the Spanish Boombite variety, which contain these compounds in both their skin and pulp. According to the study, these varieties may have higher concentrations than grapes with lighter-colored flesh.

Blueberries were also highlighted for their potential to support endothelial function, which helps blood vessels regulate circulation, and reduce arterial stiffness.

The researchers also identified other fruits that can contribute to a heart-healthy diet, including pomegranates, citrus fruits, apples and cherries. These provide different nutrients and compounds, such as flavonoids, potassium and soluble fiber.

The findings suggest that including a variety of these fruits in a balanced diet may support cardiovascular health. However, they should not be considered a replacement for medical treatment or other established measures to prevent heart disease.