The best time for infants to take calcium supplements is when early symptoms of calcium deficiency appear, including night terrors and crying, easy to be frightened, shaking their heads during sleep, etc. The best time to take calcium supplements is early in the morning, before bedtime and one hour after meals. In the process of growth and development, infants need a lot of calcium ions in their bodies because of their rapid development, so they are prone to calcium deficiency and need to be supplemented in time. Calcium deficiency in infants can lead to panic attacks, excessive sweating, irritability, irritability, occipital baldness, and even O-leg, X-leg, and rib cage exostosis, etc. In this case, calcium should be supplemented scientifically as soon as possible. Calcium supplementation includes dietary therapy, such as the intake of foods with high calcium content, and calcium supplements, which are usually liquid-based for infants and young children and are easy to consume and have a high absorption rate. In addition, it is recommended that parents pay attention to the supplementation of cod liver oil and more sunshine while providing calcium supplements for their children to facilitate the absorption of calcium.