i need a b12 injection Sandoz Vitamin Injectable Solution - 1000 mcg/10 mL Boost Your Energy with B12

Hendren RL, James SJ, Widjaja F, Lawton B, Rosenblatt A, Bent S

Thus, additional research is required to develop protocols for screening, prevention and treatment of metformin-induced vitamin B12

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There is currently no guaranteed method for measuring the status of methylation, but there are some good markers

So if you are concerned, and have access to Pfizer, it may be the better option if you are worried about reacting

Common Side Effects Pain or swelling at the injection site Mild diarrhea Itching or rash Serious Side Effects Severe allergic reactions (rare) Dizziness or fainting Unusual tiredness or weakness Precautions Disclose any allergies or existing medical conditions before use