Give your baby GNC Milestones® Baby™ Vitamin D-3 Drops with confidence! Vitamin D-3 supports strong bones & teeth. For babies, Vitamin D requirements might not be met through breastmilk alone. According, to The American Academy of Pediatrics full term babies who are exclusively or partially breastfed should be supplemented with 400IU of Vitamin D per day. That is why with the help of our GNC experts, we have formulated the Baby™ Vitamin D-3 Drops with exactly 400 IU of Vitamin D-3 to make sure your baby is meeting their important nutritional needs!