system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 - Howcome you shouldn’t refreeze food once you have taken it out of the fridge?
gpt
It has less to do with safety and more to do with food quality. Every time you freeze food, the ice crystal formation ruptures cells or otherwise breaks down the food. Meat in particular gets mushy.

The other posters are correct that any time above freezing is time where bacteria can be growing more quickly, but this is the same "clock" the food was on before you froze it. If you thaw something and immediately refreeze it, you wouldn't face real increased risk, just degraded quality.