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DOI: 10.1172/JCI116842
The American Diabetes Association recommends that people on Metformin have their B12 levels checked at least once a year
Vitamin B12 is essential to the human body
In addition to the cost of the injections themselves, there may be fees for the administration of the shot, especially if done at a healthcare facility
For most people, the practical approach involves working with a healthcare provider to establish a baseline through blood work, then adjusting session frequency based on symptom improvement and lab results
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