metabolism and energy expenditure vary, so it’s a very rough estimate. The absorption and, therefore, how much energy is available for you to use, is also affected by how the food is processed.
An example of this is sweetcorn. If you grind it down into a powder and make a tortilla, you will absorb far more calories than if you eat whole sweetcorn kernels.
Instead, you will see most of the kernels untouched, in the toilet!Another concern with calories is that instead of thinking about nutrient quality, it promotes prioritizing quantity.
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