Elsewhere the paper notes that vegetarians and vegans (including athletes) 'meet and exceed requirements' for protein. And, to render the whole we-should-worry-about-getting-enough-protein-and-therefore-eat-meat idea even more useless, other data suggests that excess animal protein intake is linked with osteoporosis, kidney disease, calcium stones in the urinary tract, and some cancers. Despite some persistent confusion, it is clear that vegetarians and vegans tend to have more optimal protein consumption than omnivores. 
Jonathan Safran Foer, Eating Animals
food, health, meat, veganism, vegetarianism