Tiny, wild, and packed with polyphenols, Vaccinium angustifolium, commonly known as wild blueberries, are gaining renewed scientific attention. Wild blueberries boost vascular function, improving blood flow within hours and supporting heart health over time. © ShutterstockIn multiple clinical trials cited in the review, participants showed improved vascular reactivity within hours of a single serving of wild blueberries. Wild blueberries boost gut health: 6-week study links daily intake to rise in Bifidobacterium and key blood metabolites. The evidence gathered over the past two decades positions wild blueberries as a potentially impactful food in the broader conversation on cardiometabolic health.