Calcium deficiency in 10-month-old babies should first take oral calcium supplements, such as oral calcium carbonate D3 granules or oral calcium gluconate solution, and vitamin D supplements, such as oral vitamin AD drops or alfacalcidol. In addition, let your baby get more sunshine and outdoor activities, through the ultraviolet radiation can promote the synthesis of vitamin D in the skin, vitamin D can promote the absorption of calcium. In addition, dairy products contain more calcium, the baby can continue to eat breast milk or drink milk powder, so that they can supplement calcium.