Edwin K. McDonald IV, MD, is dedicated to improving the health of individuals and communities through nutrition education. He works with patients with small bowel diseases, obesity and other conditions affecting the digestive system.
Dr. McDonald's interest in the effects of nutrition on health and disease stem from his experience with Project Brotherhood — an innovative clinic dedicated to providing accessible, affordable care for black men on Chicago's South Side. While training barbers to serve as health educators, he became keenly aware of the impact of social determinants of health, including the role of nutrition. In 2012, Dr. McDonald received a certificate in professional cookery from Kendall College School of Culinary Arts.
Dr. McDonald also is an active researcher. He recently investigated the effects of vitamin deficiency in patients requiring parenteral nutrition (intravenous feeding) and studied the usefulness of fecal calprotectin in patients with inflammatory bowel disease. He also created a web-based mobile program to assess the utility of applications in managing inpatient hepatology patients. Dr. McDonald's work has been funded by the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK).
Aspirin Use and Mediterranean Diet Adherence as Factors Associated With Overall Mortality in Patients With MASLD in NHANES.
Aspirin Use and Mediterranean Diet Adherence as Factors Associated With Overall Mortality in Patients With MASLD in NHANES. Hepatol Res. 2026 Mar; 56(3):330-338.
PMID: 41319245
Atypical Presentation of Colonic Sarcoidosis and Current Diagnostic Challenges.
Atypical Presentation of Colonic Sarcoidosis and Current Diagnostic Challenges. Case Rep Gastrointest Med. 2025; 2025:5549338.
PMID: 41209849
Expanding Nutrition Training in Gastroenterology: A Call to Action.
Expanding Nutrition Training in Gastroenterology: A Call to Action. Gastroenterology. 2025 Sep; 169(4):753-754.
PMID: 40449757
Common Variable Immunodeficiency-Like Enteropathy Associated with Rituximab B-Cell Depletion Therapy.
Common Variable Immunodeficiency-Like Enteropathy Associated with Rituximab B-Cell Depletion Therapy. Dig Dis Sci. 2025 Mar; 70(3):996-999.
PMID: 39843789