These findings come from a 23-year–long study of the diets of more than 53,000 Danes. It showed that habitually consuming foods rich in flavonoids provided protection against both cancer and heart disease. Study leader Nicola Bondonno of Australia’s Edith Cowan University, noted this protective effect appeared to be strongest for those at high risk of chronic diseases due to their lifestyle habits, including cigarette smoking and drinking more than two standard alcoholic...