Vitamin B12

Which B 12 test are the best


1.  High B12   <-PUB MED The pathophysiology of elevated vitamin B12 in clinical practice.

2.  B 12

3.  another

4.  https://vimeo.com/41334073 video IF

5.  intrinsic factor B12 absorption

6. http://www.b12.com methylmalonic acid (MMA)
this is the test for intracellular absorption ref: http://www.b12.com/

7. FOLATE AND METHELATION

8. https://nutritionfacts.org/video/new-vitamin-b12-test/ Holotranscabalamin TEST

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3215392/ Holotranscabalamin TEST

9. http://www.b12-vitamin.com/blood-levels/