IM injections allow for slower absorption , giving the vitamin to the blood over time
If they dont work well, B12 can build up and cause problems
Its a bit like your daily Vitamin C or orange juice shots
Enzymatic Sensitivity and Matrix Remodeling Assays: Exploring enzyme regulation and extracellular structure behavior in controlled environments
NCBI Bookshelf Best practices for injection (asepsis, preparation, and administration) Related research, protocols, and guides Explore the available research context, protocol variants or comparisons, and practical guides
Severe, long-standing damage may take longer or may be permanent, which is why early treatment matters