Infants need to take vitamin AD drops every day, but care needs to be taken to ensure that they are supplemented in moderation and not overdosed on under a doctor’s supervision. Generally speaking, infants need to take vitamin AD supplements two weeks after birth to replenish the nutrients needed by infants, and at the same time, it can prevent nutritional vitamin D deficiency rickets and night blindness caused by vitamin A deficiency. Because breast milk contains very little vitamin D, it is difficult to meet the needs of infants. Vitamin D deficiency can easily lead to an imbalance of calcium and phosphorus metabolism in the body, resulting in impaired bone development and rickets. Therefore, it is necessary to artificially supplement the right amount of vitamin AD every day to ensure the healthy growth of infants. It is also important to note that vitamin AD drops should not be oversupplemented to avoid metabolic disorders. You can also let your child receive a certain amount of sunlight to promote the absorption of vitamin D and maintain the normal growth and development of infants.