b12 injections and diabetes do you take vitamin injection when you are on metformin The Truth About B12 Injections:
Description
Healthcare providers may recommend MIC B12 injections 1-3 times per week, with the exact frequency determined by individual health needs and goals [1]

The injection is given into the muscle of the upper arm or buttock

But, some patients might need more frequent doses

Allergic reactions are rare but possible
