Blueberries May Reduce Cardiovascular Risk Factors In People With Metabolic Syndrome
Metabolic syndrome significantly increases the risk of cardiovascular disease. A new study has found that blueberries may help reduce the risk of cardiovascular disease in people with metabolic syndrome by up to 15%.
One hundred and thirty-eight people participated in the study. They were between the ages of 50 and 75, were overweight or obese, and had metabolic syndrome. One-third of the participants consumed 75 grams (1/2 a cup) of blueberries, one-third consumed 150 grams (1 cup) of blueberries, and one-third consumed a placebo daily for six months. Insulin resistance, flow-mediated dilation, and lipoprotein status were monitored throughout the study period.
At the end of the study, participants who consumed 150 grams of blueberries daily showed sustained improvements in flow-mediated dilation and arterial stiffness. The improvements were equivalent to a 12-15% reduction in the risk of cardiovascular disease. They also had increases in HDL cholesterol levels. No change was seen in insulin resistance. No improvements were seen in the group that consumed 75 grams of blueberries daily.
The study was conducted by researchers from the University of East Anglia. It was published online ahead of print on May 28, 2019 in The American Journal of Clinical Nutrition.