The Sunshine Vitamin in Just One Drop Dietary Supplement 90 Drops for 90 Days Mom's Choice Awards - Honoring Excellence Babies Need Vitamin D for Healthy Growth and Development Contains No Preservatives, No Artificial Flavors, No ColoringVitamin D is important for healthy growth and development in infancy and childhood especially for normal bone growth and muscle strength.The American Academy of Pediatrics recommends that infants who are breast-fed or partially breast-fed should be supplemented with 400 IU of vitamin D daily.