The main manifestation of zinc deficiency in children is in the digestive system, as zinc deficiency decreases the sense of taste and deteriorates digestion and absorption, so it is common for zinc deficient children to show reduced appetite, partial eating, picky eating, and even anorexia. With zinc deficiency, digestive and respiratory disorders are likely to occur. Once sick, the disease may be prolonged and recurrent. Zinc deficiency also affects the normal nutrition of children over time, and growth and development are affected, resulting in lower height and weight than children of the same age and gender, which is also very common. Zinc deficiency may also cause children to have poor mental health, their skin may not look as good as usual, and their sleep may be affected to varying degrees.