sunbath
Every morning at eight or nine o'clock, after four o'clock in the afternoon, take the baby outdoors to enjoy the sunshine bath. Find a shady place, such as the shade of a tree, and let them bathe in the warm sunshine. You can start with a few minutes and then gradually extend it to two hours. Sunshine bath can enhance the baby's immunity and promote the absorption of calcium.
Calcium supplement
Babies under six months generally don't need extra calcium supplement, just vitamin D. However, if the baby has symptoms of calcium deficiency, it is necessary to supplement calcium in time to ensure the normal development of bones and teeth. In order to make your baby synthesize enough calcium, besides vitamin D and calcium, you should also remember to take your baby to outdoor activities and let the sunshine fill their smiles!