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b12 injections im or sc π subcutaneous β what's the difference? Both deliver medication, but where and how matters. β’ Intramuscular (IM): deep into muscle β faster absorption (e.g. many vaccines, B12) β’ Subcutaneous (SC) Vitamin B12 Injections vs.
Vitamin B12 Injections vs. Supplements: Which is Right for You?
doi: 10.1038/nature05026
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How Do B12 Injections Work
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