Ok, this is true, but what happens is the calories burned part changes dramatically based on hormones. And hormones change quite a bit as you age and or gain we

Ok, this is true, but what happens is the calories burned part changes dramatically based on hormones. And hormones change quite a bit as you age and or gain weight, and not in favor of weight loss. The hormone mix basically tells your body to store some percentage of calories in as fat. When young and/or fit, this percentage is low. Calories above your burn rate are stored as glycogen in your muscles, giving you usable energy stores that will be used when you exercise. When older or fat or both, calories above your burn rate go to fat cells waiting to fill back up. As the weight packs on, the percentage increases and more and more of the calories you consume are going to fat instead of being burned. Your caloric burn alotment goes down. You lose muscle density. Testosterone goes down, and the percentage of calories dedicated to fat stores climbs. So it is still true, calories in < calories out to lose weight. But perhaps it would be better to say “calories in < (calories out + calories stored)” Where calories stored will vary and for fat people it’s much higher than fit. A fat man can eat the same food and calories as a fit person who does not exercise, and gain weight and feel tired while the fit person feels an energy boost.