The greatest discovery in my life

[emjay]

gradually gaining traction and respectability.

I haven't watched the videos yet, but I've been hearing about intermittent fasting long enough to believe it's better than quackery, for sure. 

One thing that gives confidence is that it doesn't make outlandish claims. As far as I know, no one has claimed that it cures cancer, or guarantees you'll live to 120, or is suitable for everyone in every condition. Nor does it require you to buy stuff. If you had to spend a hundred dollars on magic powder to make it work, then I would be skeptical. 

We all eat so much junk these days -- it makes sense if someone says "you don't need all that!"

To be fair, he does make claims about cancer, but I'd say they're incidental rather than the main thrust of his argument. Basically - and don't quote me on this, cos it's only a rough gist - related to the cellular processes of rejuvenation he described... ie in a nutshell, that our cells accumulate waste over time and that through exact cellular processes I can't remember right now in detail, but will look up in the future, fasting triggers these cells to start recycling their waste material to provide energy, rejuvenating them in the process. As I said, don't quote me on the technicals, because it was complicated, and I haven't yet done any further research into them, but however controversial his conclusions may be, I don't think we have any reason to doubt his honesty/competency when describing physical and cellular processes... if nothing else, how would he get away with misrepresenting the underlying biology? Anyways, long story short, I think he makes a good, and fascinating, logical case in the video that speaks for itself if the underlying biology as described is true, if it's not then all bets are off, but as I said, I don't think there's any reason to think he'd, at least intentionally, misrepresent that.

As for the rest, yeah, no claims to live to 120, and no purchase necessary ... so if it is quackery, it's very subtle quackery.