The amount of calcium a child needs each day is usually related to the child’s age. The details are as follows: A baby aged 0-6 months usually needs about 200mg of calcium per day; a baby aged 6-12 months needs about 500mg of calcium per day; a baby aged 1-3 years needs about 600mg of calcium per day; a child aged 4-8 years needs about 800mg of calcium per day; and a child aged 8-18 years needs about 1000mg of calcium. When parents give calcium supplements to their children, it is usually necessary to take into account the age of the child to formulate a calcium supplementation program. For example, younger babies with enough milk are already sufficient for their body, so there is no need to take additional calcium supplements at this time. For children, if they take dairy products every day, they can also consume enough calcium and do not need additional calcium supplements. Calcium supplementation should usually be judged according to the child’s condition, and additional supplementation is only needed if there is a deficiency of calcium in the body, do not blindly give calcium supplementation to the child to avoid adverse effects.