Enfamil D-Vi-Sol infant vitamin D drops have Vitamin D that helps your baby's body absorb calcium for strong bone and teeth development. One serving contains 100% of the daily value of Vitamin D for breastfed infants from 0-12 months as the American Academy of Pediatrics (AAP) recommends. The AAP recommends 400 international Units (IU) of vitamin D daily beginning the first few days of life for breastfed or partially breastfed infants, or infants who receive less than one liter or one quart of vitamin-D-fortified formula daily. The standard dosage for Enfamil D-Vi-Sol is 1 milliliter (mL) per day.