High diversity of dietary flavonoid intake is associated with a lower risk of all-cause mortality and major chronic diseases

Higher habitual intakes of dietary flavonoids have been linked with a lower risk of all-cause mortality and major chronic disease. Yet, the contribution of diversity of flavonoid intake to health outcomes remains to be investigated. Here, using a cohort of 124,805 UK Biobank participants, we show that participants who consumed the widest diversity of dietary flavonoids, flavonoid-rich foods and/or specific flavonoid subclasses had a 6–20% significantly lower risk of all-cause mortality and incidence of cardiovascular disease, type 2 diabetes, cancer, respiratory disease and neurodegenerative disease. Furthermore, we report that both quantity and diversity of flavonoids are independent predictors of mortality and several chronic diseases, suggesting that consuming a higher quantity and wider diversity is better for longer-term health than either component alone. These findings suggest that consuming several different daily servings of flavonoid-rich foods or beverages, such as tea, berries, apples, oranges or grapes, may lower risk of all-cause mortality and chronic disease. The intake of polyphenolic compounds is part of a healthy diet, but the contribution of a diversity of flavonoids to health outcomes remains unknown. This study shows that participants in the UK Biobank cohort with the greatest diversity of flavonoid intake had a 6–20% lower risk of all-cause mortality and major chronic diseases.