There are several types of weight loss surgeries, with Roux-en-Y gastric bypass surgery being one of the most common. This surgery involves creating a small pouch from the stomach and connecting it directly to the small intestine, bypassing a large part of the stomach and the first part of the small intestine. This reduces the amount of food the stomach can hold and decreases nutrient absorption. Another common type is sleeve gastrectomy, where a large part of the stomach is removed, leaving a tube-like structure. Both surgeries help people feel full faster and eat less. Post-surgery, patients need to make lasting lifestyle changes, like eating smaller meals and exercising regularly, to maintain weight loss. Complications can occur, including nutrient deficiencies, but taking supplements and regular check-ups can help manage these risks.