Vitamin B12 deficiency is what it boils down to in arguments concerning nutrition between meat eaters and vegans. I've heard plenty of times that we as humans can only obtain vitamin B12 from animals and not plants. However, I decided to do research and found this: Vitamin B12 is needed for cell division and blood formation. Neither plants nor animals make vitamin B12. Bacteria are responsible for producing vitamin B12. Animals get their vitamin B12 from eating foods contaminated with vitamin B12 and then the animal becomes a source of vitamin B12. Plant foods do not contain vitamin B12 except when they are contaminated by microorganisms or have vitamin B12 added to them. So why are meat eaters so hung up on B12 as their final argument when bacteria where we actually get it from? You can get vitamin B12 from plants just as easily as you can get it anywhere else.. Right?