“Berry good” arteries: The effects of berry consumption on vascular health Original paper

The study examined the short-term and long-term effects of berry consumption on endothelial dysfunction. The berries included blueberries, cranberries, and black currants (among others), taken as whole fruit or extracts for 1 to 16 weeks. The control groups received either a placebo (typically flavored drinks without active compounds) or no treatment.

When consumed with a meal, berries improved flow-mediated dilation (how well blood vessels widen with increased blood flow) but didn’t affect other measures. With long-term intake, berries also improved flow-mediated dilation and further reduced pulse wave velocity. However, the results varied across studies (high heterogeneity).

The benefits were stronger in shorter studies (less than 12 weeks) and in participants with health conditions. Blueberries and black currants had greater effects than cranberries or other berries.