It provides 400 IU of vitamin D per liquid drop, which is important for normal growth and development, especially for bones and muscles. The American Academy of Pediatrics recommends that infants receive 400 IU of vitamin D3 daily. Unfortunately, most babies don't receive enough vitamin D from sun exposure or their diets to reach the recommended daily intake. Baby's Super Daily D3 provides 400 IU of vitamin D3 in one convenient flavor-free drop. Place one drop directly on the tongue, add it to your baby's formula, or use it while breastfeeding.