A small stomach pouch is created restricting the amount of food you can eat.
A portion of the small intestine is bypassed. Since the small intestine is responsible for absorbing the calories from the food you eat, bypassing a portion of the small intestine results in fewer calories being absorbed, thus creating additional weight loss.
The hormone ghrelin has been nicknamed the “Hunger Hormone” by researchers because of its significant effect on appetite. Gastric Bypass results in a fall in ghrelin levels resulting in a reduced appetite.