Newborns generally need to supplement vitamin A, vitamin D, vitamin K, and zinc to meet the needs of growth and development. 1. Vitamin A: Newborns need to supplement a certain amount of vitamin A. Vitamin A deficiency occurs in infants and young children, and may cause night blindness, and a long-term deficiency of vitamin A may also cause symptoms such as short and thick bones, poor dental development, and slow growth. 2. Vitamin D: the main source of vitamin D for newborns after birth is the synthesis of skin light, vitamin D deficiency may cause vitamin D deficiency rickets. 3. Vitamin K: Vitamin K deficiency in newborns can easily cause bleeding, such as gastrointestinal bleeding and intracranial bleeding. Newborns can be injected with vitamin K1 at birth to prevent neonatal hemorrhage. 4. Zinc: newborns with zinc deficiency may have anorexia, etc. For those who are already deficient in zinc, they can choose to take zinc supplement preparations. Parents should pay attention to the nutritional adequacy of newborns, once the amount of breastfeeding or diarrhea caused by micronutrient deficiencies, should pay attention to micronutrient measurement, and follow the doctor’s instructions for the appropriate supplementation.