Common side effects include pain or redness at the injection site, mild diarrhea, itching, and swelling
Always use methylcobalamin, not cyanocobalamin, as methylcobalamin is pre-activated and immediately available for your body to use, especially important if you have MTHFR genetic variations or methylation issues
Anyway, for ease of self-injecting we recommend the belly and other places for your B12 shots, such as How to inject vitamin B12 into your belly
[19] Other than that, though, B12 injections are considered to be quite safe, so try not to worry about doing it "wrong." As long as you wash your hands, work in a sterile environment, and inject into the proper site using the correct technique, you'll do great.Thanks Tips Store vitamin B12 injection medication at room temperature, away from moisture, heat, and light
Insert the needle into the ampoule or vial: For vials, inject air equal to the dose to ease withdrawal
Sources of Vitamin B12 Vitamin B12 is primarily found in animal-based foods such as meat, fish, poultry, eggs, and dairy products