Vitamin D continues to be important to prevent rickets in all infants, particularly African American infants. The AAP journal Pediatrics just published the results of a study that show normal Vitamin D levels in the breastfeeding infants of mothers who supplement a high dose of Vitamin D. Mothers took one multivitamin with Vitamin D 400 iu, plus a Vitamin D supplement of 6000 iu (total of 6400 iu daily.) Supplementing 2400 iu was not sufficient. This was a randomized, double-blind, comparative effectiveness trial conducted at MUSC in Charleston, SC and in Rochester, NY from November 2005 to August 2012.