How can a person burn more calories per day than consumed? Where did the extra energy come from if food not equivalent to that amount was consumed?

Question

How can a person burn more calories per day than consumed? Where did the extra energy come from if food not equivalent to that amount was consumed?

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Answer 1

Fat reserves and also to a lesser extent muscle (if you’re exercising this will reduce the amount of energy your body takes from your muscles though). That’s why being in a calorie deficit is what makes people lose weight