Bulsiewicz is board-certified in gastroenterology and internal medicine,[5] and worked for many years as a gastroenterologist in South Carolina medical centers.[5] He is currently the U.S. Medical Director for Zoe.[10]
38TERA
In 2024, Bulsiewicz founded 38TERA, a gut health supplement company focused on microbiome science.[11] The company's flagship product, DMN (Daily Microbiome Nutrition), is a prebiotic supplement combining three classes of prebiotics derived from seven plants, and is certified Low FODMAP.[12] Simon Hill, host of The Proof podcast, serves as on its Scientific Advisory Board.[13]
Research
Bulsiewicz's research and advocacy centers on the relationship between dietary fiber, the gut microbiome, and plant-based nutrition. He references Dan Buettner's work on the Blue Zones, communities around the world who consume predominantly fiber-rich plant-based diets.[14][15] Bulsiewicz argues that "if you look at the healthiest populations on the planet in modern times, they're in the five blue zones, and all five blue zones are 90 percent plant based. So, they are not necessarily vegan, but they are plant-predominant in a way where the meat is not the centerpiece. The plant is the centerpiece. The meat is the side show."[16] He also advocates for the consumption of plant-based fermented foods for better health.[17]
In addition to academic scholarship, he is the author of three books: Fiber Fueled (2020),[18][19]The Fiber Fueled Cookbook Inspiring Plant-Based Recipes to Turbocharge Your Health (2022),[20] and Plant Powered Plus: Activate the Power of Your Gut to Tame Inflammation and Reclaim Your Health (2026).[21]
Books
Plant Powered Plus: Activate the Power of Your Gut to Tame Inflammation and Reclaim Your Health.Avery, 2026. ISBN978-0593418796.
The Fiber Fueled Cookbook: Inspiring Plant-Based Recipes to Turbocharge Your Health.Avery, 2022. ISBN978-0593418772.
Fiber Fueled: The Plant-Based Gut Health Program for Losing Weight, Restoring Your Health, and Optimizing Your Microbiome.Avery, 2020. ISBN978-0593084564.
Bulsiewicz grew up eating the Standard American Diet, which led to poor health during his medical studies (as nutrition was not part of his medical training).[22] He only turned to a plant-based diet around 2012-2013[7] (during his time as a Fellow at UNC Chapel Hill) when he met, and was influenced by, Valerie who was already plant-based.[23][22] They married in 2013,[24] and live with their children in Charleston, South Carolina.[22]
