Denise Faustman has been a major player in diabetes research for a long time; it’s not a fraud. She is a somewhat polarizing figure in the diabetes world. Some people dismiss her work as far-fetched and irrelevant while others believe very strongly in what she tries to do. She sometimes pursues lines of inquiry that other researchers treat dismissively, but she is most definitely for real and means what she says.
Personally I believe in reserving judgment about the promise of any line of investigation; we’ve been falsely encouraged only to be let down far too many times. But I also believe that everything deserves to be tried. The answer is “out there somewhere”, as Fox Mulder would say. Just because we haven’t found it yet is no reason to reject possibilities. Quite the opposite, in fact—it’s a reason to pursue them.