Patrick Michael "Mike" O'Hearn (born January 26, 1969) competes in natural bodybuilding and powerlifting competitions and is also an actor and fitness model. He has been featured on over 500 magazine covers, was Fitness Model of the Year seven times and claims he was a state champion in judo and tae kwon do, and was a four-time Mr. Natural Universe title holder. He appears as the gladiator "Titan" on the 2008 revival of American Gladiators ; Michael is the only individual to be a Gladiator on both the original (1989–96) (as Thor ) and the 2008 series .
The main reason I find this implausible is that it's not evolutionarily supported. There is just no strong evidence that evolving humans ate fibrous plants with any regularity. Moreover, any gut bacteria that we can't easily keep living inside us seem unlikely to have evolved there. It makes no sense that regularly eating something we didn't evolve to eat regularly, to keep alive something that doesn't appear to have evolved a strong penchant to stay alive in us, would be the only, let alone best way to maintain an inner environment conducive to health.