人体内必需的微量元素有铁、锌、铜、碘、硒等14种。它们在机体内含量极微,却起着重要的生理作用,如人体的血清只含百万分之一的锌。却是人体必需的微量元素,在生理功能上起着极为重要的作用。孩子体内缺锌会患异嗜癖,例如喜欢泥土、煤块等,这是由于缺锌引起味觉损坏所致。缺锌也可使孩子长期食欲减退消失,即厌食症。缺锌还可使孩子患复发性口腔溃疡,影响生长发育。缺锌还能导致孩子患矮小症,这是因为锌与许多酶、核酸及蛋白质的合成密切相关,能影响 The human body essential trace elements are iron, zinc, copper, iodine, selenium and other 14 species. They are very low levels in the body, they play an important physiological role, such as the body’s serum contains only one part of zinc. It is an essential trace element of the human body and plays an extremely important role in physiological functions. Children zinc deficiency will suffer from addiction, such as like the soil, coal lumps, which is due to lack of zinc caused taste damage. Zinc deficiency can also make children lose their long-term loss of appetite, that anorexia. Zinc deficiency can make children suffer from recurrent oral ulcers, affecting growth and development. Zinc deficiency can also cause children with short stature, because zinc is closely related to the synthesis of many enzymes, nucleic acids and proteins that can affect