Symptom 1: Calcium deficiency can lead to osteomalacia and osteoporosis, especially in adolescents. If calcium deficiency occurs for a long time, neglect of treatment will lead to rickets.

Symptom 2: inattention, easy fatigue, backache, low immunity, abnormal tooth development, black tip or sawtooth shape, obvious growth pain, leg weakness and cramp; Muscle weakness, allergies and colds are all manifestations of calcium deficiency.

Symptom 3: Calcium deficiency in children will lead to dysplasia, and calcium deficiency in adults will lead to heel pain and lumbar and cervical pain; Teeth loose and fall off; Obvious hunchback, decreased height, loss of appetite, digestive tract ulcer, constipation, dreaminess, insomnia, irritability, irritability and so on.