most reputable vitamin b12 injection B-12 Injectable for Horses, Dogs and Cats 1000 mcg / 250 ml This product requires a valid prescription and is intended for veterinary use only. Vitamin B12 Injection: Energy Boost
Description
2015 Apr 23;58(8):3548-71

If you are unaware if you are vitamin B12 deficient, view the symptoms of vitamin b12 deficiency, if you believe you have a few of the symptoms or all, contact us to book an appointment so we can review your symptoms with you, and go over how vitamin B12 injections will be beneficial to you

We usually test before starting treatment, then after 1-3 months

1938 Jun;32(6):969-75
