Dr. Brannon presently serves as a member of the Institute of Medicine Food and Nutrition B the IOM WIC Food Package Review Committee, he National Agricultural Research, Education, Extension and Economics Advisory Board, and the Steering Committee for the International Vitamin D Standardization Program. Key past service includes the Institute of Medicine Dietary Reference Intakes for Calcium and Vitamin D Committee, co-chairing the Federal Trans Agency Vitamin D Working Group as a Visiting Professor in the NIH Office of Dietary Supplements, the NIH Consensus Panel on Lactose Intolerance, the NIH State of the Science Panel on Multivitamin/mineral Supplements and Chronic Disease Prevention, National Institute of Diabetes, Digestive and Kidney Diseases Special Study Section, the NIH Nutrition Study Section, FASEB Science Policy Committee, past-chair of the American Society for Nutrition's Nutrition Council and Public Policy Committee, and past Chair of the Board of Human Sciences of the National Association of State Universities and Land Grant Colleges.