cyanocobalamin vs methylcobalamin b12 injections Injection – 1000 mcg/mL Vitamin B-12 Cyanocobalamin
1000 mcg
Description
[DOI] [PubMed] [Google Scholar] 11.North BJ, et al

This is usually not more than 1 mL per minute
The Advantages of Lymall Bpanda 1

How quickly does a Vitamin B12 shot work

But for those with pernicious anemia, an autoimmune condition that attacks intrinsic factor, the passive absorption of B12 is incredibly inefficient with only one percent being taken up from your food

COAs are supplied solely for verification of identity, purity, composition, and analytical characteristics for laboratory research purposes