he's real, an actual person, if you're talking about his show, he's showing how to survive, what to do, he doesn't have to maintain the survival diet, that's why he eats regular food on breaks.
I watched one of his shows that was based near my house. The guy didn't know shit. At one point he was hiding from a javelina, claiming if it even hears him it will attack. I know he has a big, impressive resume, but his show is melodramatic nonsense.
I loved Survivorman! Personally I'd rank Les Stroud over Bear Grylls, but the later is probably a more well known, household name so that's why they chose him :/
LET LE STROUD DO THIS