system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 What makes beetroot so red? and more specifically why does it stain almost everything it touches?
gpt
Beetroot contains a water-soluble red pigment called betalain, and it also contains water. So in terms of staining it makes it functionally the same as watercolor paint, which, as you might guess, stains everything it touches when mixed with water.