The Man With a Window in His Stomach: Birth of Gastroenterology

In 1822, a point-blank musket blast left Alexis St. Martin with a permanent open hole into his living stomach. What followed was one of the most unbelievable, and ethically troubling, chapters in medical history, as a frontier army surgeon used that window to discover how human digestion actually works.This episode traces the partnership between St. Martin, an illiterate Canadian voyageur, and Dr. William Beaumont, exploring the groundbreaking science and the deeply uncomfortable power dynamics between a doctor and his human guinea pig. The knowledge they produced underpins everything we know about gut health today.How a catastrophic shotgun wound healed into a gastric fistula when St. Martin's stomach fused to his skin, sealing off fatal infectionBeaumont's roughly 200 experiments over a decade, dangling food on silk strings into the stomach and even tasting the gastric juice himselfHow he proved digestion was chemical, not cooking or rotting, by shipping juice samples to chemists at Yale and watching the empty stomach secrete acid on demandThe exploitative contract binding St. Martin as a servant for 150 dollars a year, and his eventual refusal to return, influenced by his wife's objectionsThe morbid epilogue: how St. Martin outlived Beaumont by nearly 30 years and how his family let his body decompose to protect his famous stomach from grave robbers