What effects will occur on the body when the stomach “quits” and goes offline?

[Written at the end of the article] In 1897, Carl Schlatter, a young surgeon in Zurich, successfully performed the first total gastrectomy and esophagoenteric anastomosis on a 56-year-old woman with diffuse gastric cancer. Surgery has gradually become the most commonly used treatment for gastric cancer, and total gastrectomy has become more and more popular in clinical practice.