As a leading researcher and educator on Evidence-Based Practice and Policy, Dr. Johnston regularly leads workshops, classes and journal clubs for nutrition students and allied health professionals, and has published first and senior authored nutrition research in the Journal of the American Medical Association (JAMA), British Medical Journal (BMJ), Annals of Internal Medicine and American Journal of Clinical Nutrition. He has a Google H-Index of 58, considered exceptional for his career stage according to Hirsch’s categorization scheme, and the work he has collaboratively contributed to has been cited over 16,000 times.