The main symptom of zinc deficiency is 1. Anorexia; 2. Backward growth and development; 3. Adolescent sexual retardation; 4. pica; 5. susceptible to infection; 6. Skin and mucous membrane symptoms; 7. The fetus is backward in growth and development, with multiple deformities; 8. others.

Symptoms of zinc deficiency mainly include:

(1) anorexia. When zinc is deficient, taste bud function decreases, taste function decreases, appetite decreases, eating decreases, and digestive ability weakens;

(2) Backward growth and development. Zinc deficiency hinders the synthesis of protein, reduces food intake and affects children's growth and development. In severe cases, dwarfism can occur. Children with severe zinc deficiency may be affected in their intellectual development and even have mental disorders;

(3) Adolescent sexual retardation. Specifically, the testicles and penis of male genitals are too small and sexual function is low; Female breast development and late menstrual cramps; Male and female pubic hair appeared late;

(4) pica. Children with zinc deficiency may like to eat dirt, wall skin, paper, cinder or other foreign objects, and adults also like to eat dirt.

(5) easy to be infected. People with zinc deficiency have decreased immune function and are prone to various infectious diseases, including diarrhea;

(6) Skin and mucous membrane symptoms. When zinc deficiency is serious, various rashes, bullous dermatitis, recurrent oral ulcers, long-term unhealed lower limb ulcers and alopecia can appear on the whole body skin.

(7) The fetus is backward in growth and development, with multiple malformations. Severe zinc deficiency in pregnant women can lead to fetal growth and development backwardness and various malformations, including neural tube malformations. Prolonged labor process, weak uterine contraction and excessive bleeding;

(8) others. Because of the disorder of vitamin A metabolism, serum vitamin A is decreased, and the dark adaptation time is prolonged, resulting in night blindness.