The people obtain each kind of nutrient which and the energy through the diet needs, maintains own health. The reasonable diet sufficient nutrition, can raise a generation of person's health standard, the prevention many kinds of disease's occurrence development, the extension life, improves the national quality. Unreasonable diet, over-feeding or insufficient, can bring the varying degree to the health the harm. Diet excessively because the excess nutrient will cause the obesity, diabetes, gallstones, the hyperlipemia, hypertension and so on many kinds of diseases, will induce the lump, like breast cancer, colon cancer and so on. Not only serious influence health, will reduce the life. The diet medium and long-term raises the element to be insufficient, may cause the malnutrition, anemia, many kinds of elements, the vitamin deficiency, affect the child intelligence growth, human body disease-resistant ability and the work, the work, learning capability drop.
人们通过饮食获得所需要的各种营养素和能量,维护自身健康。合理的饮食充足的营养,能提高一代人的健康水平,预防多种疾病的发生发展,延长寿命,提高民族素质。不合理的饮食,营养过度或不足,都会给健康带来不同程度的危害。饮食过度会因为营养过剩导致肥胖症、糖尿病、胆石症、高脂血症、高血压等多种疾病,甚至诱发中瘤,如乳腺癌、结肠癌症等。不仅严重影响健康,而且会缩短寿命。饮食中长期养素不足,可导致营养不良,贫血,多种元素、维生素缺乏,影响儿童智力生长发育,人体抗病能力及劳动、工作、学习能力下降。