In a study published in Nature Communications, researchers found that a moderate habitual intake of flavonoids is inversely associated with all-cause, cardiovascular- and cancer-related mortality. This strong association plateaus at intakes of approximately 500 mg/day.
Flavonoids, plant-derived polyphenolic compounds, have been linked with health benefits.
Foods with high flavonoids are onions, kale, parsley, tea, red wine, chocolate, citrus fruits, soybeans, tomatoes, apples, grapes, berries, and more.