[thelazydogsback]

Most things that increase normal cellular growth by stimulating the mtor pathway and IGF production, etc., will also increase abnormal cellular growth - including things like, well, eating - esp. carbs/sugar and protein. It's certainly possible that a marked increase in NAD _could_ increase the growth of certain types of cancers, but I'd think this effect would be swamped by other factors.

As for "medical doctors" -- unless the MD in question is a (sports) nutrition specialist, perhaps oncologist, _and_ has graduated in the last few years or spends many hours a week keeping up with research that is accelerating every week, there's a good chance an intelligent consumer of podcasts/blogs/reddit/books is a better source of info on this topic. (Which is why I had to tell my MD why I wanted to take Metforin.) Not knocking MD's - but most simply don't have the time for this sort of thing the way practices are set up now.