MrsD, thank you for your quick response. I'm still pouring over the information in your links. I had a CBC done a month ago with unusual results and my internist wanted a repeat. My research lead me to include the test for B-12 with no argument. As you mentioned the MCV was out of range on both tests (113 and 115 respectively).

I've got two bottles of the cyano B-12 (thanks to CVS bogo sale). I'll switch when they are empty.

Thanks again,
Jim