Oops. I just added to my post because I now see that Liza Jane beat me to it. Yes to what she said!

If you want further testing, the thing to insist upon would be methylmalonic acid and homocysteine. If you are deficient, wasting time taking another unreliable B12 test is not a good idea.

I would insist on the two tests, MMA and Hcy, early next week. And then I would begin taking methylcobalamin on the way out of the lab. If they won't perform the tests early next week, I would begin the methylcobalamin anyway. The important thing is your health, and this is a possibility. If you need it, the damage will continue until you get it!

rose