Do you know how there's B12 in animals? Because of SUPPLEMENTS. This is because the natural way of getting B12 is through dirt - dirt on veg, or second hand dirt that animals ate, but mostly through first hand dirt because we didn't actually eat that much meat back in the day. However, because of all out hyper-clean food now, even the animals people eat have to be given it through supplements. That doesn't sound very natural either to me. Vegans just get their supplements first hand.