Your analogy of distance is excellent. The thing I hope people eventually learn from the current data we are getting from weight loss meds is how much the body and brain can modify metabolic processes. Even in bariatric surgery, much of the difference between responders and nonresponders comes down to neuropeptide signals from the gut to the brain. There is so much more to know. Another analogy may be that the same gallon of fuel will get a small sedan much further than a 30 yr old 2 ton truck.

What is your argument here Kenny? A calorie by definition is a calorie, so the gym nutritionist isn’t wrong. What you went on to describe impacts of types of calories. Which doesn’t negate the fact that a calorie is a calorie.