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Potential Side Effects and Safety Considerations Vitamin B12 injections are usually safe but can have side effects
Systemic lupus erythematosus (SLE) and rheumatoid arthritis have been noted in case reports
The thigh: This is the most common site used by people who are self- administrating the injections, or giving an injection to an infant or a small child
Along the way, several factors can limit how much your body actually absorbs
Your vitamin B12 levels can be accurately checked by a simple blood test, which is important for your doctor to know what amounts of Vitamin B12 are suitable for your health requirements
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