how much does vet charge for b12 injection Vitamin B-12 1000 (VetOne), 100 mL Vitamin B12 Injectable | City
Description
It could be unrelated but seems ironic that it started on the same day as the rash and lump at injection site

So, while we dont get much B12 in the water anymore, we dont get much cholera, either, which is a good thing

pmid:34345275CrossRefPubMedGoogle Scholar Porter KM, Hoey L, Hughes CF, et al

It is usually preferable to take the used needles and syringes to your veterinary clinic or local pharmacy for proper disposal

Why labs cant go without it: Studied for NAD+ and energy metabolism Explored in fat storage and energy balance models Linked to longevity research A frontier peptide for modern metabolism studies.

Kris Johnson was also very helpful
