vitamin b12 injection veterinary B-12 3000 mcg/ml Veterinarians may prescribe vitamin B12 injections to animals with a deficiency Vitamin for Cattle, Sheep, Swine,
Description
The peptide may potentially reduce visceral fat, support muscle tone, and improve overall metabolic function

As for effectiveness, heres a study in which healthy women were randomly assigned to consume 400 g of folic acid, 416 g of methylfolate (the bioequivalent dose of folic acid), and 208 g of methylfolate (half dose)

What are the negatives of B12 injections

A good provider should help you choose whats appropriate, rather than pushing injections for everyone
