How Should My Vitamin B12 Levels Be Measured?

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No, we don't routinely get B12 levels unless there's a reason. Now that reason could start with you. So you're B12 level should be measured if you're having symptoms. If you're having numbness and tingling you can't account for, or forgetfulness you can't account for, or a change in mood, or energy level you can't account for.

Always make sure your doctor knows about a change in your health status. And B12 might be on the list of causes and then we'd have to go looking for it. But what often happens is, we're are routinely getting what's called a complete blood count. So we look at the red blood cells, the while blood cells, and if B12 is deficient, it can cause anemia.

But even before it causes anemia it makes red blood cells look funny. They actually get big and they get pale. It also make white blood cells look funny. So if you have a routine blood test and it looks funny, that may result in a B12 level. The B12 level is a blood test for measuring serum levels of B12.

You can't do this at home, so you need your doctors help here, but if there's any reason to go looking for a B12 level either because of what is seen on routine blood testing, or because of what you report feeling, it's a fairly easy essay, and we do it as a matter of routine when there is a reason.

But don't count on your doctor to do it just as a part of a battery test. It's not routinely done for that purpose.