There are many clinical manifestations of zinc deficiency in babies, the specific manifestations of which are as follows: 1. If the baby has a poor appetite, does not like to eat, manifesting as poor nourishment, picky eating, anorexia, etc., pay attention to whether it is caused by zinc deficiency. 2. 3. When babies often have colds, fevers, coughs and other illnesses, some of them also have decreased immunity due to zinc deficiency. 4. If the diarrhea does not improve for a long time and there are no other causes such as inflammation, you should pay attention to whether the recovery is slow due to zinc deficiency, as most of them can gradually stop diarrhea after supplementation.