As of one year ago, my B12 normal serum levels were at 836 and my folate was indicated as high- over 20. However, I have all of the symptoms of low B12 and/or folate. I've been taking a multi and B Complex in pill form for 2-3 yrs now. I respond pretty well to sublingual b-complex and if I go without it for more than a day my immune system/energy/nails takes an immediate hit. I've told my GP that the liquid really helps and she said "probably not but take it if you'd like"... I wanted to ask my doctor to order a test of active b12 (the MMA test and the Holo-T test) but I'm afraid that my doc will think I'm nuts and brush it off. Is it weird to ask your doc for this blood work since is it somewhat left field?