脂肪是人体所需营养素之一。它可为机体提供热能、热能储备和脂肪酸。它是脂溶性维生素的溶剂,还可增加食物的风味和保护蔬菜等食物中的维生素等物质免于与氧接触而氧化。但是,脂肪与癌症却有着直接和密切的关系,主要与胃肠道癌症和内分泌器官癌症有关,特别是乳腺癌、前列腺癌和结肠癌。许多调查表明,乳腺癌的发病率和死亡率增高,和每人摄取总脂肪量有关。1911年到1975年的资料,发现增加脂肪量比增加糖和蛋白质而引起的乳腺癌死亡时间早10年。随着每人总脂肪量的摄取 Fat is one of the nutrients the body needs. It provides the body with heat, heat reserves and fatty acids. It is a solvent for fat-soluble vitamins and also increases the flavor of foods and protects vitamins and other substances in foods such as vegetables from being oxidized by contact with oxygen. However, fat and cancer have a direct and close relationship, mainly with gastrointestinal cancer and endocrine organ cancer, especially breast cancer, prostate cancer and colon cancer. Many surveys show that the incidence of breast cancer and mortality increased, and total fat intake per person. Data from 1911 to 1975 found that increasing fat mass was 10 years earlier than breast cancer death caused by increased sugar and protein. With each person’s total fat intake