This guideline was coordinated by Dr Chizuru Nishida, Coordinator of the Nutrition Policy and Scientific Advice Unit (NPU) in the WHO Department of Nutrition for Health and Development (NHD), with technical support and inputs from Dr Jason Montez, Technical Officer, NPU, and Dr Francesco Branca, Director, NHD. WHO gratefully acknowledges the technical input and expert advice provided by the members of the WHO Nutrition Guidance Expert Advisory Group Subgroup on Diet and Health, and by the external experts and resource persons for the development of this guideline, including the authors of the background systematic reviews. WHO also recognizes the valuable contributions made by the external peer reviewers and interested stakeholders who provided comments in response to public consultation.