is there more than one type of injectably vitamin b12 Cyanocobalamin Injection 1000 mcg — Mountainside Medical Vitamin B-12 Injection - Mobile
Description
Some people experience delayed gastric emptying which usually resolves within a week or two after the procedure, but some patients might develop a permanent digestion problem from it

The Best Test Ultimately, the best test your doctor can perform is one at the intracellular level

[DOI] [PubMed] [Google Scholar] 48.Sen U., Mishra P.K., Tyagi N., Tyagi S.C

Or has the color changed since you started using this vial
