system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why do people stop being hungry when they're sick?
gpt
When you get very sick your body no longer craves food to conserve energy. Digesting takes away precious energy it needs to fight off the sickness. That’s why loss of appetite lets you know you have the flu vs a cold because the flu is more serious than a cold, therefore taking more energy to eradicate.