system
Given the following post, respond as if you're commenting on Reddit:
human
Why do we lose the desire to eat while we are sick? (Ex. when having a cold, I lose the desire to eat)
gpt
Something no one's really mentioned yet is that when you get sick your immune system releases cytokines. One of these, TNF-a, makes you lose your appetite. It's the main cytokine that causes cancer patients to get skinny and have very little appetite.