There are many manifestations of zinc deficiency in babies, which are generally summarized as follows: 1) decreased appetite, anorexia, refusal to eat, and picky eating, or no hunger; 2) indiscriminate eating of strange things, such as biting nails, chewing hair, eating toys, eating dirt, etc.; 3) delayed growth and development; 4) low immunity; 5) nails easily appear white spots or horizontal lines; 6) hyperactivity, inattention, academic performance 7, vision problems, such as easy myopia, farsightedness, night vision difficulties; 8, skin damage, such as skin trauma, wound healing is very slow; 9, puberty developmental disorders; 10, chronic or long-term diarrhea, or mouth ulcers recurring attacks.