system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do french fries taste awful if reheated, but something like pizza is comparable whether fresh or reheated?

Other foods don't reheat well, too. Rice, macaroni and cheese, etc. Why?
gpt
I assume you're asking about microwave reheating? Microwaving essentially boils your food. Oils will make your food more soggy, water will evaporate, drying it out. Something crispy like a fry becomes soggy. Something moist like rice becomes dry.