b12 injections given where How to self-inject intramuscular vitamin - Overview Vitamin B12 Injection Sites: All

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Body size and build

Also, injections are not typically recommended for people without a vitamin B12 deficiency

Deteriorating muscle strength and function as we get older lead to debilitating conditions like frailty, which can be life threatening

Dietary Supplements Vitamin B12 Food Sources Vitamin B12 is found in food sources such as fish, poultry, meat, eggs, and milk

The muscle is obviously deeper than your subcutaneous tissue (you can see the image above for reference)