It is okay for babies to take vitamin AD or vitamin D. Medical advice is needed for specific cases. Vitamin A is a fat-soluble vitamin, it is difficult to pass through the placenta into the fetus, and illness will deplete the body’s stores of vitamin A, making it easy to become deficient. Vitamin D promotes calcium absorption, maintains bone strength and regulates immunity. Vitamin D and AD drops are used to prevent and treat vitamin D deficiency and pediatric tetany. Prolonged overdose can result in bone and joint pain, itchy skin, fever, vomiting and nausea. It should be noted that vitamin D increased, hypercalcemia, hyperphosphatemia with renal rickets patients are prohibited. Babies eat vitamin AD or vitamin D is possible, the specific dose and supplementation time need to follow the doctor’s instructions, choose one of them is good. Avoid the adverse consequences of overdose supplementation.