Sorry, but it’s not that simple. 2000 calories consisting of mostly junk (bad carbs) is not nearly in the same league as 2100 good calories (small varying amounts of good carbs, plus an ample amount of protein & healthy fats).
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It doesn’t make any difference where the calories come from.
It does make a difference. Yes, we know that's not the conventional wisdom. But like the beliefs about salt, the conventional wisdom is not based an science. And it's wrong.
>>It doesn’t make any difference where the calories come from.<<
CO2 causes the warming of the Earth.