Like many of my physician colleagues, I have been accused of harping on a single weight loss message. Weight loss is merely a question of calories in and calories out we usually say. Just make your calorie balance negative and all will be well. You keep on arguing with us. ‘I swear I don’t eat that much, I watch my calories but I’m not losing weight,’ you respond. We then roll our eyes and complain about you in the doctor’s lounge (just kidding).