The B12-producing bacteria that used to populate our soils have been depleted through modern agricultural techniques, meaning that even grazing livestock is unlikely to get enough B12 for us to absorb efficiently by consuming animal-derived food
Int J Vitam Nutr Res 60(4):351359 Mariet A, Zou F, Chai HS, Younkin CS, Miles R, Nair AA, Crook JE, Pankratz VS, Carrasquillo MM, Rowley CN et al (2012) Glutathione S-transferase omega genes in Alzheimer and Parkinson disease risk, age-at-diagnosis and brain gene expression: an association study with mechanistic implications
After completing an IV course, your doctor may recommend maintenance using different methods, such as: Taking oral tablets
10.1158/0008-5472.CAN-07-0515 Cancer Res
[DOI] [PMC free article] [PubMed] [Google Scholar] Philips S