The Benefits of a B12 Shot

Science has not yet identified any dangerously high level of cobalamen that would be remotely realistic. Whatever B12 your liver cannot hold, you just pee out. People say they get a short-term energy boost from a big B12 shot and on that basis, B12 is also sold as a weight loss drug. The notion, as far as I can gather, is that high-dosing B12 will give you, like, extra healthy red blood cells.