PubMed Sikiric, P., Separovic, J., Anic, T., Buljat, G., Mikus, D., Seiwerth, S., Grabarevic, Z., Stancic-Rokotov, D., Pigac, B., Hanzevacki, M., Marovic, A., Rucman, R., Petek, M., Ziger, T., Sebecic, B., Zoricic, I., Turkovic, B., Aralica, G., Perovic, D., Duplancic, B., Lovric-Bencic, M., & Rotkvic, I
For individuals with digestive sensitivities, those taking acid-reflux medications, or anyone on a plant-based (vegan/vegetarian) diet, absorbing enough B12 through food or pills is virtually impossible
They help regulate critical biological processes, including hormone production, fat breakdown, cellular repair, and energy metabolism
Its possible to have "normal" levels on this test but still have a functional deficiency where your body can't actually use the B12 it has