Will Burger King kill me?

Because caveman was healthy not because he didn't eat grains, but because he ran a lot, he went hungry (aka unplanned fasts) a lot, he had to struggle with the elements etc. So it's mighty convenient of you to just say it was all because of not eating grains and ignore the other important elements of that equation.

 

Also most likely it wasn't meat, fish, poultry, eggs that they ate like "paleolithic" diets, but actually everything they found

 

Watch the documentary "Super Size Me"