Patsy Catsos, MS, RDN, LD

Patsy Catsos, MS, RDN, LD

Nutrition Consultant, FODMAP Expert

Expertise

IBS, FODMAP, GI Disorders, Gastrointestinal Health

Education

Cornell University, Boston University

Highlights

Experience

Patsy Catsos, MS, RDN, LD, is a former writer for Verywell Fit covering gastrointestinal health and irritable bowel syndrome. She is a registered dietitian nutritionist with a private practice in Portland, Maine. 

Patsy has been using the FODMAP approach with irritable bowel syndrome patients since 2008. After reading the early peer-reviewed literature about FODMAPs out of Australia’s Monash University Department of Gastroenterology, she set about developing a program to help her patients with IBS free themselves from the devastating symptoms of IBS. Keenly interested in digestive health and nutrition since her own diagnosis with ulcerative colitis 25 years earlier, she had never seen a dietary approach for managing gastrointestinal symptoms produce such fast, effective results. Her 2009 book IBS—Free at Last! introduced consumers and health care providers to the power of the FODMAP elimination diet. The latest edition of her book and program, now titled The IBS Elimination Diet and Cookbook, was published in 2017 by Harmony Books, an imprint of Penguin Random House. She is also the author of The IBS-Free FODMAP Toolkit for RDNs, a collection of reproducible patient handouts, forms, and nutrition care planning advice for healthcare professionals.

Patsy is a professional member of the Crohn’s and Colitis Foundation of America and the Academy of Nutrition and Dietetics. She is an active member and a past-president of the Maine Academy of Nutrition and Dietetics; she was honored as Maine's 2014 Outstanding Maine Dietitian of the Year.

Education

Verywell Fit Editorial Process

Verywell Fit is an award-winning online resource that empowers you to reach your diet and fitness goals. We take a human approach to health and wellness content and reach more than 120 million readers annually.

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Our writers are notable voices in their respective disciplines, including registered dietitians, certified personal trainers, fitness coaches, board-certified physicians, and health journalists. These individuals are specifically selected for their extensive knowledge and real-world experience, as well as their ability to communicate complex information in a clear, helpful, and unbiased way.

Our team of qualified and experienced fact checkers provide a critical step in our commitment to content integrity. Fact checkers rigorously review articles for accuracy, relevance, and timeliness. We use only the most current and reputable primary references, including peer-reviewed medical journals, government organizations, academic institutions, and advocacy associations.

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