膳食合理是健康长寿的物质保证，如果说世界上真有可以使人延年益寿的灵丹妙药，那就是平衡膳食。科学膳食的要义就是要根据食物的营养特点和性味功能，合理地选择和摄取食物。唐代药王孙思邈就曾告诫人们："不知食宜者，不足以生存也。"本书从食物对人体的作用、相克的食物、食物的健康搭配与常见病相克的食物、与常见病相宜的食物、与常用药物相克的食物、与常用药物相宜的食物以及日常饮食的禁忌等方面，进行了全面、科学的论述，使人们从饮食误区中走出来，走向更科学、更健康的生活。(A reasonable diet is the material guarantee for good health and longevity. If there is really a panacea that can prolong life in the world, that is a balanced diet. The essence of scientific diet is reasonable selection and intake of food according to nutrition characteristics and nature, taste and action of food. Sun Simiao, the king of medicine of Tang Dynasty had warned people: "the man who doesn't know reasonable diet can not survive well." The book comprehensively and scientifically expounds from many aspects such as the function of food to human body, antagonistic food, healthy collocation of food, antagonistic food to common diseases, appropriate food to common diseases, antagonistic food to common medicine, appropriate food to common medicine and taboo in daily diet to make people extricate from misunderstanding of diet and have more scientific and healthy life. )