伊迪丝考恩大学（ECU）的最新研究发现，通过每天只吃一杯富含硝酸盐的蔬菜（如绿叶蔬菜和甜菜根），人们可以显著降低患心脏病的风险。研究发现，富含硝酸盐的蔬菜的最佳量是一天一杯，多吃似乎没有任何额外的好处。

One cup of leafy green vegetables a day lowers risk of heart disease -- ScienceDaily

1. Catherine P. Bondonno, Frederik Dalgaard, Lauren C. Blekkenhorst, Kevin Murray, Joshua R. Lewis, Kevin D. Croft, Cecilie Kyrø, Christian Torp-Pedersen, Gunnar Gislason, Anne Tjønneland, Kim Overvad, Nicola P. Bondonno, Jonathan M. Hodgson. Vegetable nitrate intake, blood pressure and incident cardiovascular disease: Danish Diet, Cancer, and Health Study. European Journal of Epidemiology, 2021; DOI: 10.1007/s10654-021-00747-3