The Four Types of Vitamin B12: Which One Is Right for You? The Use of B12 Injections in Meat Production B12 Shots Tampa FL, Urgent Care South Tampa Immediate Care People love to bring up B12 like it's a reason to eat meat. But here's the irony Even meat eaters can be deficient in B12. That's because B12 comes from bacteria in Vitamin B12 1000MG The B12 in meat is from supplements given to the cows.so why not just take the supplement directly : r vegan