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喂养婴儿以母乳最好,因为母乳不仅含有比例恰当,易于消化吸收的蛋白质、脂肪和糖,而且含有能抵御病菌的抗体。可有的母亲因产后无奶或少奶,不得不用牛奶喂养。吃牛奶的孩子容易出现口干舌燥,口角生疮、尿少色黄、大便秘结等症状,这就是人们常说的“上火”。孩子吃牛奶为什么会上火呢?这是因为牛奶中含有丰富的蛋白质,而蛋白质在体内的代谢过程中需消耗较多的水分,加之含氮的代谢产物如尿素、肌酐等从尿中排泄时,也需要带出相当的水分,不仅如此,牛奶中富含钠,从肾脏排出时也要带走不少水分。由此看来,牛奶中蛋白质代谢产物和钠的排泄,大大加重了婴儿肾脏工作负荷。而婴幼儿的肾功能尚不健全,浓缩功能较差,要排泄如此多的“溶质”——蛋白质代谢产
Breastfeeding is best because breast milk contains not only the right amount of proteins, fats and sugars that are easily digested and absorbed, but also antibodies that resist germs. Some mothers may have no milk or less milk after childbirth, had to use milk to feed. Children eating milk prone to dry mouth, mouth sores, oliguria, constipation and other symptoms, which is often said that “get angry.” Why do children eat milk? It is because the milk is rich in protein, while the protein metabolism in the body need to consume more water, combined with nitrogen-containing metabolites such as urea, creatinine and other excretion from the urine , But also need to bring considerable water, not only that, milk is rich in sodium, when discharged from the kidneys have to take away a lot of water. From this, the excretion of protein metabolites and sodium in milk greatly aggravates the infant’s kidney workload. The infant’s renal function is not perfect, poor concentration function, to excrete so much “solute” - protein metabolism