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It's not even a warm/cold food thing, it's more like you're low on energy so your body isn't producing as much heat as usual. When it happens to me it's usually before lunch.


This is known as specific dynamic action, or the thermic effect of food. Your metabolism does actually increase as a result of eating.

https://en.wikipedia.org/wiki/Specific_dynamic_action


> it's more like you're low on energy so your body isn't producing as much heat as usual

I expected that to be the cause, but me eating cold yoghurt to replenish my energy or me eating a hot sandwich makes a big difference, I now notice.




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