Complementary feeding refers to the introduction of foods other than human milk or formula to a child's diet. In response to a request from the Centers for Disease Control and Prevention, the National Academies of Sciences, Engineering and Medicine's Health and Medicine Division convened the Committee on Complementary Feeding Interventions for Infants and Young Children under Age 2 to conduct a consensus study scoping review of peer-reviewed literature and other publicly available information on interventions addressing complementary feeding. The interventions studied took place in the US and other high-income country health care systems; early care and education settings; university cooperative extension programs; the Special Supplemental Nutrition Program for Women, Infants, and Children (WIC); home visiting programs; and other settings. The resulting consensus study report, Complementary Feeding Interventions for Infants and Young Children under Age 2: Scoping of Promising Interventions to Implement at the Community or State Level (2023), summarizes evidence and provides information on interventions that could be scaled up or implemented at a community or state level. Lorrene Ritchie of the Nutrition Policy Institute at the University of California, Agriculture and Natural Resources, was a committee member and contributed to the development of the report.