人体所需的营养素有蛋白质、脂类、碳水化合物、维生素、矿物质、膳食纤维、水七大类。通常前三类人体需要量多,在膳食中所含的比重大,称为宏量营养素;矿物质和维生素等因需要量较少,在膳食中所占比重也小,称为微量营养素。科学研究表明,微量营养素摄入少可能加速老年人退行性疾病进程,使老年人老得更快。对老年人而言,身体需 The body’s nutrients are protein, lipids, carbohydrates, vitamins, minerals, dietary fiber, water seven categories. Usually the first three types of human needs more than the weight contained in the diet, known as macronutrients; minerals and vitamins due to less demand, the proportion of the diet is also small, known as micronutrients. Scientific research shows that micronutrient intake is less likely to accelerate the process of degenerative diseases in the elderly, so that older people get older faster. For the elderly, the body needs