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
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
It is not known if CYANOKIT is safe and effective in children
A subset of patients (roughly 18%) report that the weekly injection protocol stops working around week 10-12
High doses of vitamin C injections seem to have few side effects