What is a good way for someone who has diabetes to lose weight?

The same: as anyone else -- eating less and exercising more. You have to burn off 3,500 calories to lose a pound. Try cutting out 250 calories a day to lost a pound every two weeks. It's not how fast your lose, but you need to learn to eat properly to not only lose the weight but keep it off the rest of your life. Good luck.

Low carb food: Avoid high carb foods such as grains, lentils, potato based items. Avoid milk protein (cheese, yogurt, milk, etc). Consume plenty of low carb foods such as eggs, chicken, fish, meats, non starchy vegetables, avocados, some saturated fat (example: butter, coconut oil), olive oil, some nuts. This diet helps to reduce blood sugar, cholesterol, weight Please don't hesitate to contact for more help