During a vertical sleeve gastrectomy, your bariatric surgeon will remove up to 80% of your stomach and form the remaining part into a tube that resembles a sleeve.
Your significantly smaller stomach reduces the amount of food you are able to eat and drink, initially to about half a cup at a time. Your smaller stomach also produces less of the hormones that affect your appetite. The combination of being able to eat less and wanting to eat less results in significant weight loss.