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We adjust the dose based on how well theyre doing and lab results
Though not frequently used, the Schilling Test is performed to check how well a patient absorbs B12 within the intestinal tract
Research community sources commonly describe rotating injection sites (abdomen, outer thigh, back of upper arm) to lower the chance of local irritation
The frequency depends on your individual needs
Learn How An easy to follow step-by-step for intramuscular injections can be found on our How to Perform an Intramuscular Injection of Vitamin B12 page
In these cases, B12 injections provide a direct source of the vitamin, circumventing the digestive system and aiding in absorption
