how to give yourself an injection of b12 Shots at Home: How, Where & Often Inject where b12 injections are given
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Vitamin B-12 injections for weight loss: Do they work

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B12 shots are given in the deltoid or gluteal muscle

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So, these are much safer B12 values: As Sally and Jeffrey note: At this time, we believe normal serum B12 levels should be greater than 550 pg/ml

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