TAMARA DUKER FREUMAN, RN, CDN, MS is a nationally-known expert in digestive health and medical nutrition therapy for gastrointestinal diseases. In addition to her clinical work, Tamara is a high-profile nutrition writer whose advice is read by hundreds of thousands of people each month in publications including U.S. News & World Report's eat + run blog where she is a contributor, and its syndicates, MSN Health, and Yahoo! Health.