Do Vitamin B12 Shots Need To Be Refrigerated? Invigor Medical Many people believe that vitamin B12 is only found in animal products, but that's a misconception. B12 is actually produced by bacteria in the soil, and animals get their B12 by consuming B12 doesn't magically come from animals, it's made by bacteria in soil. Farmed animals are literally injected with B12 these days because they don't get it from food anymore. We scrub and Viva! B12 what vegans need to know The B12 in meat is from supplements given to the cows.so why not just take the supplement directly : r vegan Which foods are high in vitamin b12? B12 Injection Clinics