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It prevents progression of anemia and nerve damage by supplying B directly, even when intrinsic factor (the gastric protein needed for oral B12 absorption) is lacking
Even in the case of prescription, doctors dont recommend long-term treatment
Comini-Frota ER, Rodrigues DH, Miranda EC et al (2012) Serum levels of brain-derived neurotrophic factor correlate with the number of T2 MRI lesions in multiple sclerosis
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