Will Bulsiewicz, MD, MSCI, known as 'Dr. B,' is an award-winning gastroenterologist and gut health expert. He is the New York Times bestselling author of 'Fiber Fueled,' 'The Fiber Fueled Cookbook,' and 'Plant Powered Plus.' Dr. B has authored over twenty-five scientific papers and has delivered keynotes to various organizations, including Congress and the USDA, as well as at major medical conferences.
As Co-Founder and Co-CEO of 38TERA, Dr. B collaborates with nutrition scientist Simon Hill to create clinically informed, microbiome-supportive supplements. His work emphasizes the integration of rigorous science with practical applications, empowering individuals to harness the gut microbiome's potential for restoring balance, reducing inflammation, and achieving lasting wellness. He resides in Charleston, South Carolina, with his wife and four children.








