人在生活过程中,不断由外界摄取养料(糖、脂肪、蛋白质)水及氧气等。这些养料在人体内经过一系列的化学变化,将向体外排出另一些物质:这排出物的成份和摄取物的成份是完全不同的。例如由消化器官吸收进入体内的养料葡萄糖、脂肪酸、甘油及氨基酸等等,在体内经过一串互相作用的化学变化合成了体内的糖元,体脂及蛋白质。而体内原有的糖元,体质及蛋白质将经过一串互相作用的化学 People in the process of life, continue to ingest nutrients (sugar, fat, protein) water and oxygen by the outside world. These nutrients undergo a series of chemical changes in the human body that will expel substances to the outside of the body: The composition of this discharge is completely different from the composition of the intake. For example, nutrients such as glucose, fatty acids, glycerol and amino acids absorbed into the body by the digestive organs, synthesize glycogen, body fat and protein in the body through a series of chemical interactions that interact with each other. The body’s original glycogen, constitution and protein through a string of interactions between the chemical