I was diagnosed with B12 many years ago and my blood test showed up that I was border line and would need injections fairly soon, as I was not able to absorb it. I was also told that it was not curable. Since then I have asked for a B12 test at my now Dr's and grudgingly have had two in the last 13 yrs but they said both were fine?????? I have a lot of the symptoms that go with this am very tired cannot go all day without a nap of 1 - 2 hrs, I am very lethargic and find it hard to get things done. I have depression and find it hard to be content. Can I have this test done privately and if so would it be very expensive. I am 70 yrs old.