premise: Superhuman abilities may be prevented by human enhancement by genetic modification.
hypothesis: Healing factor . The source of a character 's healing factor , depending upon the medium , usually ranges from natural genetic mutation , accidental exposure to radioactive materials , artificially-induced genetic enhancement , cybernetic augmentation , magic or even a combination of different factors . Superhuman . Superhuman abilities may result from human enhancement by genetic modification , cybernetic implants , nanotechnology , radiation or from human evolution in the future .