Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Blueberry is often promoted for vascular health, including support of the arteries, primarily due to its high content of polyphenols, particularly anthocyanins. There is a growing body of scientific evidence supporting the cardiovascular benefits of blueberry consumption. Several randomized controlled trials have shown that regular intake of blueberries or blueberry extracts can improve endothelial function, reduce arterial stiffness, and lower blood pressure in both healthy individuals and those with metabolic syndrome or hypertension. Mechanistically, anthocyanins and other flavonoids in blueberries possess antioxidant and anti-inflammatory properties, which help protect the arterial wall from oxidative stress and inflammation—two key factors in the development of atherosclerosis. For example, a 2019 study in the American Journal of Clinical Nutrition reported that daily blueberry consumption improved endothelial function and reduced systolic blood pressure in adults with metabolic syndrome. However, while these results are promising, the overall quality of evidence is moderate due to limitations such as small sample sizes, short study durations, and variability in blueberry preparations used. Large-scale, long-term studies are still needed to confirm the extent of arterial support provided by blueberries. In summary, there is scientific evidence—though not yet conclusive—that blueberries may benefit arterial health.

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