B12 testing via urine. It's interesting to see they don't look for B12 but MMA/creatine concentrations.

Vitamin B12 Deficiency Urine Test | Dr. Schweikart

Thanks for the link Marlene. I’m embarrassed to say I WAS reading the report wrong. The optimal number for this test is 40 and I’m at 12. Still low with a super high blood serum reading with no supplements, but not as far off as I thought! Vitamin B2 is actually much lower as well. Hopefully we can find out why and correct these things with supplements and or injections. I’ve had PN that has continued to get worse over the past five years and never supplemented because I thought as did my doctor that my serum levels are very high every time I have blood work done. Mrs. D told me when I first came here that didn’t seem normal and she was right as usual.

In case this helps...

I discovered by genetic testing that I'm a carrier of the Biotinidase Deficiency variant. This causes me to have very low "normal" values of the enzyme. As best I understand it, the enzyme is responsible for allowing your body to make use of biotin (B7) in food sources. I'm not supposed to affected with just low levels, but since taking biotin supplements, a metabolic problem I was experiencing has disappeared completely. Biotin is involved in the metabolic process involved.

I also took the Nutra Eval test at one point, and it didn't show any problems with my biotin levels. Without high enough levels of this enzyme, though, I think it was indeed impeding my ability to make use of it, and supplements have absolutely helped me.

Thank you everyone. I’ll be interested to see what my doctor’s plans are since according to the Eval report I’m deficient in several vitamins. Again, these are vitamins that I should be getting plenty of from my diet and my blood serum levels are extremely high with no supplements. There must be a reason they are not absorbing, but I’m not sure if there are further tests to determine that or if I will just leave with a list of supplements that won’t absorb either. Hopefully he will have a plan, but since this test is new to medical doctors here, it may be harder to talk to him about methylation, MTHFR and absorption issues. Even the B vitamins bother my stomach, so taking a truckload of things is not going to be possible.