[john567]

This is false because everything isn't metabolized the same. I don't like this idea of trying to apply physics. It's not the right model.

Simple example, you eat only protein and fat, you don't gain weight. You substitute some fat for carbohydrates and you suddenly go up in weight. This despite you just went down in calories.

You can also mess with your feeding window and loose weight. Simply cram in a days worth of calories over a few hours and eat nothing for the rest of the day and you'll likely loose weight do the opposite (eat several times during the day) and you gain weight. Assuming same total calorie count overall.

[cstrahan]

To add to this train of thought: different diets might change the use of the incoming calories in more or less favorable ways. If you hold calories constant, but otherwise vary the diet, conceivably the body could respond with differing amounts of muscular hypertrophy, cell repair, etc. Given that different diets result in different impacts to various hormone levels, it is (in my view) worth consideration.

[inspector-g]

Citation for these claims?