I'm 6mths post op and the only difference I feel is lack of hunger and when my stomach makes gurlging noises now and again. Apart from the lack of appetite and eating less, or not being able to eat certain foods like crusty bread, chip shop chips and rice, nothing has changed. Oh and I dont go for a number two so much now, I used to go 3 to 4 times a day, now its once every 3 to 4 days! I dont feel any different inside my body from having had the bypass surgery at all.