What Are B12 Injections? And Are They Safe? OmegaQuant B12 Injections: What is B12 and Who Needs It? Janine Buisman Wilcox Naturopathic Doctor 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 Where does vitamin B12 come from? And why is it so hard to produce? In the meat and dairy industry, animals are often supplemented with Vitamin B12 due to modern farming practices that limit their natural intake. So people who eat animals are simply taking a Vitamin B12 in Pregnancy: What You Need to Know NaturoBest