Sleeve gastrectomy is a weight loss surgery that involves the removal of a large portion of the stomach to reduce its capacity. The procedure works by limiting the amount of food that can be consumed at one time and also by reducing the production of the hunger hormone ghrelin.

When the stomach is reduced in size, it can only hold a small amount of food. This means that the individual will feel full more quickly, and they will eat smaller portions. Additionally, the smaller stomach size causes the food to be processed more slowly, which means that the individual will feel fuller for longer periods of time.

The removal of a portion of the stomach also reduces the production of ghrelin, a hormone that signals hunger to the brain. With less ghrelin being produced, the individual will feel less hungry overall, and this can lead to a reduction in the number of calories consumed.

Overall, sleeve gastrectomy works by reducing the amount of food that can be eaten at one time, slowing down digestion, and reducing feelings of hunger. This combination of effects can help individuals to lose weight and improve their overall health.