During gastric sleeve surgery, most of your stomach (around 80-90%) is removed, leaving a slimmer stomach pouch about the size of a half cup (100-150ml).
Having a smaller stomach due to the surgery limits the amount of food you can consume, which is why it’s classified as a “restrictive” procedure. Additionally, the removed portion of your stomach produced Ghrelin, a hormone that stimulates hunger. This reduction in ghrelin levels contributes to a decrease in appetite.