Mutagen is a component taken from Utrominon and was primarily used to preserve the Utrom's biosphere and technology.
It was discovered Mutagen could be used to extend a human's lifespan, heal any wound, regrow limbs and organs, and reverse aging. With proper integration, it could even resurrect. In the Muromachi Period, Krang supplied Kitsune with Mutagen in exchange for clearing land of humans. In the present, it was used as the basis of a super soldier serum that mutated Splinter, the Turtles, and many others.
For further information, see Turtlepedia's article on Mutagen.
- Teenage Mutant Ninja Turtles Ghostbusters