Vitamin AD Combination is suitable for new born babies. Vitamin AD, mainly including vitamin A and vitamin D, is an essential substance for human growth and development, which can participate in the metabolism of calcium and phosphorus, promote their absorption, supplementation, prevention and treatment of vitamin D deficiency, especially for infants and young children has a very important role, and vitamin A is also very important for the integrity of epithelial tissues, vision development. Vitamin AD should be used under the supervision of a doctor, generally speaking, it should be used 2 weeks after the birth of a full-term baby and after the birth of a premature baby. The exact dosage needs to be used under medical supervision.