generally you should eat the same healthy diet that most people should eat meaning plenty of fruits and vegetables lean protein (lean meat beans low-fat dairy) and complex carbs (whole-wheat bread and pasta oatmeal brown rice sweet potatoes). if appetite is a problem try to eat smaller meals and snacks more frequently throughout the day. keep your snacks simple such as yogurt with fruit low-fat cheese or nuts. one of the most important things is to make sure you're getting the calories and nutrients you need. meal replacement drinks can be a good option too. for some people who have had their gallbladders removed diarrhea can be an issue. eating more fiber can help with that. pay attention to whether or not dairy foods make your diarrhea worse. if so switch to lactose-free dairy products.
what kind of diet would you say is best for a 62-year-old man with gallbladder cancer?