re: Switching to vegetarian diet

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Even cavemen ate more than just meat.
Where is the benefit in excluding veggies by doing an all meat diet?

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"Any animal, including man, that dines on herbivores will have collagen sporting a d15N that is about 7 percent greater than that found in the herbivores that are the meal, a fact confirmed by stable isotope analysis of known carnivores. A super carnivore (for lack of a better name) that dines on other carnivores and herbivores would have an even greater d15N level."

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"Early man was a high-level carnivore. (As was his distant relative the Neanderthal, who lived contemporaneously with ancient man in Europe.) A higher-level carnivore, in fact, than foxes, wolves and other known carnivores. The earliest anatomically modern humans got most of their protein from animals of terrestrial origin."

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"What the stable isotope studies don’t show, is how much carbohydrate these folks ate along with their meat. …. But since we do know that wolves and foxes are predators that consume mainly food of animal origin, and we know that early humans have an even more carnivorous stable isotope footprint, it seems unlikely that these humans would have consumed many calories from non-animal sources."

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