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Nature (2013) 496(7444):2337

However, directly comparing their efficacy is challenging due to differences in study designs, patient populations, and treatment durations

Most US residents get enough of vitamin B12 in their regular diet, but certain groups should be extra mindful of their risk for B12 deficiency and know to keep an eye out for signs and symptoms

But how do these treatments compare

The day after dose 1, I had chills and a day of diarrhea, then a day of nausea and all seemed resolved
