b12 and mic injections reddit Can be injected subcutaneously instead of IM? : r/B12_Deficiency MIC+B12 Compounded GLP-1s: Why doctors worry

PMID 30845641

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So, B12 injections can last for one month with slow release into the blood. In contrast, an IV (intravenous) infusion gives you the dose immediately so that you get the benefits immediately, and the effects are shorter lived

For most people, we definitely recommend SQ over IM

Caffeine can have a diuretic effect, leading to increased urination and potential loss of vitamin B12

The dorsogluteal muscle may seem the preferred choice because it is so large, but IM injections pose risks as there are major blood vessels and nerves located there, including the sciatic nerve