Mrs D, I have always been under the belief that one needs to take B vitamins together, as a complex, for optimal absorption. But if people are taking B12 by itself, on an empty stomach, and getting benefit from it, maybe that is incorrect?

Do you happen to know? I noticed you can get the B vitamins in pretty much any formulation you want, together, alone, with some but not all Bs, it gets very confusing. And everyone claims their formulation is best!