半岁前婴儿的消化系统发育还不完善,肠壁的通透性较高,这时不应喂蛋清。鸡蛋清中的白蛋白分子较小,有时能通过肠壁直接进入婴儿血液中,使婴儿机体对异体白蛋白产生过敏反应,导致湿疹、荨麻疹等疾病。因此,半岁前的婴儿不能喂鸡蛋清,应只吃蛋黄。 Half a year old baby’s digestive system development is not perfect, the permeability of the intestinal wall is higher, then should not be fed egg white. Albumin in egg white smaller molecules, and sometimes through the intestinal wall directly into the baby’s blood, so that the baby’s body allergic to allogeneic albumin, resulting in eczema, urticaria and other diseases. Therefore, before the age of six months old baby can not feed egg white, egg yolk should only eat.