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There is a limit to the amount of medicine that can be delivered comfortably

Common places for self-injecting B12 include: The middle of your thigh The meaty area of your hip Upper arm area Buttocks Fleshy part of your abdomen Some prescriptions are for subcutaneous injections delivered just under your skin

To learn more about the benefits, risks, & differences of compounded medication substitutes you may visit the FDA Drug Shortage List & FDA Compounding Substitutions Information Page

Though not frequently used, the Schilling Test is performed to check how well a patient absorbs B12 within the intestinal tract

Nasser Nasseri, M.D