Updating the WIC food packages: it's about time.

This issue brief reviews key revisions to the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) program proposed by the USDA, which are based substantially on recommendations by the Institute of Medicine. Should the changes become regulation, they will be the most significant revision of the WIC food packages in over 25 years. This brief describes the changes, the impetus for their consideration, and possible implementation issues from the perspectives of vendors, state and local WIC agencies, and participants.