system
Given the following post, respond as if you're commenting on Reddit:
human
[Teenage Mutant Ninja Turtles] What exactly is the Ooze or mutagen?

So what exactly is the ooze or mutagen and why does it turn animals humanoid? Or turn human's into humanoid animals. Where does it come from and how does it work? Can it be undone once mutated?
gpt
It depends on the Canon. In some cases the Ooze is extra terrestrual/dimensional and has origins relating to krang and his people in others it is created by humans via unknown methods and has a mixed bag of effects.