Eight weeks of a daily avocado and a cup of mango lined up with better blood-vessel function in 82 adults with prediabetes

What the research found

Illinois Institute of Technology researchers reported in the Journal of the American Heart Association that 82 adults ages 25 to 60 with prediabetes and a body mass index of 25 to 35 followed calorie-controlled meals for eight weeks. One group ate one medium Hass avocado and one cup of mango a day. The comparison group ate calorie-matched carbohydrate foods instead. Flow-mediated dilation rose to 6.7 percent with the fruit and fell to 4.6 percent in the comparison group. Among male participants, central pressure rose about 5 mm Hg on the comparison meals and fell about 1.9 mm Hg with the fruit. Cholesterol, blood sugar, and markers of inflammation did not differ in a meaningful way. Weight and calorie intake stayed about the same. An unrestricted grant from the National Mango Board and the Hass Avocado Board paid for the trial. Those boards had no role in the design or the findings. The trial did not count heart attacks. It is not a treatment for prediabetes. DOI 10.1161/JAHA.124.040933. Not medical advice.

Evidence level: Human study. A study in people, but an association isn't proof of cause.

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