By that qualification, aren't all regimens 'gimmicks' that "work while they work"…?
Again, I'm not really sure where people get off asserting shit like this when there are numerous existing populations w/ all-animal diets who are apparently doing just fine.Its not a diet you can eat for the next 50 years. You learned what you learned, you accomplished what you accomplished. Right? That's about as far as it goes with this sort of eating. Its just not feasible. Alright, for me, and I am going to say for anyone.
Likewise, if individuals on such diets feel better and their medical test results show objectively better physiological markers, one can't handwave away that it "doesn't work."