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For those with confirmed deficiency, B12 injections (hydroxocobalamin or methylcobalamin) deliver the vitamin directly into your bloodstream, ensuring full absorption
The instructions in this article are intended to be used only as a guideline - contact a medical professional before you give any injections at home
It is difficult to buy in the USA, and expensive
Less Common Side Effects Dizziness or fatigue: Some patients report lightheadedness or unusual tiredness after injection
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