A study published in the American Journal of Clinical Nutrition (February 2008;87(2):323–331) examined the cardiovascular effects of berry consumption in middle-aged adults. The trial included 72 participants, who were randomly assigned to either a control group or a berry-consumption group for eight weeks.

Study Design

Control group:
Participants consumed foods such as sugar water, sweet rice porridge, marmalade sweets, or sweet semolina porridge.

Berry group:
Participants consumed a structured berry regimen that included:

  • 100 grams of whole bilberries

  • 50 grams of lingonberry nectar every other day

  • On alternate days, 100 grams of puree made from black currants or strawberries

Results

After eight weeks, the berry group showed several meaningful improvements:

  • HDL cholesterol increased by 5.2% (“good” cholesterol)

  • Blood pressure improved

  • Platelet function improved, meaning the blood was less prone to forming clots

These findings suggest that regular consumption of berries—particularly those rich in polyphenols—may support cardiovascular health by improving lipid profiles, vascular function, and platelet behavior.

Educational only — not medical advice.