I don't think anyone is arguing against a hunter/gatherer diet, but a
strictly vegetarian diet will cause shortages of necessary nutrients over
time.

John Pavao

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I feel it is fairly easy to see why vegetable source carotenoids as
compared to animal source are studied and conclusions made about the
"goodness" of vegetable source diets and the "badness" of red muscle
meat diets:

Which would you rather dine on?
- carrots OR liver, kidney or ovary organs for beta carotene?
- tomatoes OR testes for lycopene?
- orange juice OR eyeballs for lutein?