In general, infants are certain to vitamin AD drops take drops, but they must be supplemented in moderation under the guidance of a physician. Vitamin D is essential for the baby’s bone development, neuromuscular system, immune system, tissue cell differentiation and metabolism and health. Vitamin A is an important nutrient for boosting the body’s immunity, which maintains the integrity of the epithelial cells of the skin and mucous membranes of the respiratory and digestive tracts, and also promotes the development of the baby’s vision, among other things. Newborns have very low levels of vitamin A, coupled with rapid growth and development of infants and young children, the demand for vitamins A and D is relatively large, relying on breast milk alone is not enough, so it is necessary to supplement vitamins A and D extra. Usually, it is generally recommended to start from 1-2 weeks after the birth of the baby, under the guidance of the physician 1 vitamin AD drops per day, not overdose, in order to prevent the emergence of toxicity and other adverse reactions.