Using a Drawing Needle For a truly professional technique, its best to use two separate needles: one for drawing the B12 from the vial and a new one for the injection itself
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
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Vitamin B12 is present in foods of animal origin, including meat, fish, poultry, eggs and dairy products