If children do not suffer from calcium deficiency during the tooth replacement period, they do not need to take extra calcium supplements and should eat a balanced diet and pay attention to oral hygiene. Children generally change their teeth between the ages of 6 and 12, and the exact timing is affected by a number of factors and varies from one individual to another. Children during this period can already get the calcium they need from food, so if blood tests don’t show that they are deficient in calcium, they don’t need to take extra calcium supplements during this period. Blindly taking calcium supplements without a doctor’s guidance may lead to hypercalcemia, which may have an adverse effect on children’s health. During the period of tooth replacement, children should pay attention to a balanced diet, do not eat too many sweets, and also pay attention to oral hygiene, brush their teeth carefully to avoid causing oral infections, please consult a professional physician for specific advice.