b12 injections im or subq Is Injection Sq Should B12 be given IM or SubQ? B12 Injections at Home -

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Possible adverse effects may include: Injection site reactions : Redness, swelling, irritation, or discomfort Gastrointestinal symptoms : Nausea, vomiting, stomach cramps, or diarrhea Headaches or dizziness Allergic reactions : Rash, itching, shortness of breath, or facial swelling (rare) Increased heart rate or anxiety (typically temporary from B-vitamins) Fatigue or weakness if used improperly Elevated liver enzymes when taken in excess particularly with methionine or choline Insomnia if taken late in the day due to increased energy levels Who should avoid or use caution

(PubMed) Milner AD, Rao H, Greenough A

Fatigue is often caused by an inability to transport enough oxygen to your bodys cells

As a result, you may feel more active and burn more calories