Look something is missing here. If an animal, a human, a penguin, consumes X calories more than it burns, they gain weight and vica versa. The calorie source is not relevant.
I know about hormonal influences, I know about BMR, I know about differences in metabolism. I think you are losing sight of what I said.
Metabolic pathways has nothing to do with the discussion of calories in, calories out. If you consume 1000 per day and you burn 1100 per day from whatever source, you can’t maintain your weight. What is so difficult about fathoming such a simple concept?
See my post number #85 above...
“If you consume 1000 per day and you burn 1100 per day from whatever source, you can’t maintain your weight.”
If you consume 1300 calories a day and burn 1100 and poop out an extra 400, what will your weight do?
If you are satisfied on 1100 calories a day of protein, fat and some carbs, are you better off weight-wise than if you need to take in 1800 calories to be satisfied? How long with you stick with an eating plan that leaves you constantly craving more food?
BTW - last night’s meal was a meat-rich chili. So far to day, as of 3 PM, I’ve had coffee and an 8 oz glass of whole milk, and I’m doing fine. But when I ate cereal for breakfast, or had bagels, I was hungry by noon and starting to get a headache. Which way of eating - and I prefer not to call it a diet - will help me control my weight?