18 years experience
Nationality: United States
Affiliation: Professor, Department of Nutrition and Metabolism, Columbia University Mailman School of Public Health
Background: Holds a PhD in Nutritional Epidemiology. His research focuses on the relationship between Vitamin D and immune system health. He has led multiple NIH-funded clinical trials and published over 120 peer-reviewed papers.
Expertise: Efficacy and safety evaluation of vitamin and mineral supplements; the role of dietary patterns in chronic disease prevention.
Profile: Known for translating complex scientific findings into clear nutritional advice for the public. Frequently invited as a scientific advisor for the U.S. Dietary Guidelines.