How much can somebody eat after one year following a vertical gastrectomy?

Opposite. Bariatric and weight loss is all about eating smaller amounts. It is not about the upper limit of how MUCH can you eat. To assist with decreasing your appetite, eating smaller amounts and staying healthy, drink 2 glasses of water before you sit down for dinner, or any meal. Pushing beyond safe limits of oral intake can blow out your gastric sutures with severe illness. Be well.