Research shows that populations with high consumption of fat have high rates of breast cancer, and many studies have shown that high consumption of fruits and vegetables reduces rates of stomach and intestinal cancers.
根據研究，脂肪消耗量愈大的地方，乳癌罹患率愈高；許多研究也都顯示，直腸癌、胃癌與蔬菜食用過少有關。