system
Given the following post, respond as if you're commenting on Reddit:
human
What is dandruff and how does it form?
gpt
Sebum is the oily stuff your skin releases, and more of it is released on your scalp than most other places on the body.

There is a fungus that every human has that feeds on sebum.

The dandruff comes from your body having an inflammation response to the fungus, which leads to a faster pace in skin cells being grown.

Thus with more skin growing than usual more of it flakes off, which is the dandruff.

Some people have a greater inflammation response to the fungus than others do, thus why some people have lots of dandruff, and others seemingly have none.