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 Vitamin B12 Benefits and Best Sources 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 A 3 oz #serving of cooked #beef provides only 175 #calories but provides: 100% of your daily #vitamin B12, as well as approx 1 2 your daily needs of #Zinc, #Protein and Selenium. #health