Vitamin B12 Benefits and Best Sources B12 Shots & B12 Injections: The Good, Bad and Alternative! 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 I often get asked if B12 is just a concern for vegans. The answer? Not at all. , Even if you eat meat or dairy, theres no guarantee youre absorbing enough, especially as you age or if youre on