Feuding with a fat. Need some scientific evidence I'm feuding with a fat girl and I need an actual scientific study demonstrating that changes in daily calorie consumption are what cause weight change, and not any other factor. Everyone always says "well it's a UNIT OF ENERGY" and gives me their reasoning, which should be bullet proof but in this case is not cutting it. I need actual science and all I can find in google is 10,000 calorie calculators and "why calories in/calories out is not true" articles written by fat people.