Different schools of nutrition argue endlessly about protein. Vegans swear it destroys our kidneys and we're eating far too much. Strength athletes and leangains devotees can't get enough. The government claims 56 grams/day is more than enough for anyone—yet even the most conservative and fat-friendly paleo templates recommend closer to 90 grams. Paleo eaters and omnivores enjoy pointing out that animal protein is "complete", unlike most grain and vegetable proteins, while vegetarians and vegans swear by "protein combining". And just about everyone gets confused when acronyms like BV, NPU, and PDCAAS enter the picture.