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Concurrent iron-deficiency anemia and folic acid deficiency may result in a blunted or impeded response to methylcobalamin therapy
However, this frequently results in diminishing returns and increased side effects
This can be a temporary side effect but should not be ignored, especially if it affects your ability to perform daily activities
The injections sit in the muscle tissue as kind of a reservoir and slowly leak out over time into the blood, explains Joshua Miller, Ph.D., a B12 researcher, and professor and chair in the Department of Nutritional Sciences at the School of Environmental and Biological Sciences at Rutgers University
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