Article: Vitamin B12 injections for tiredness.(Literature Review & Commentary)

Twenty-eight individuals complaining of fatigue completed a double-blind crossover trial of vitamin B12 injections. Prior to the study, all subjects had normal levels of hemoglobin and vitamin B12. Hydroxocobalamin (5 mg intramuscularly, twice a week for 2 weeks) was followed by a 2-week washout period, and then a similar course of placebo injections. In about half of the participants, placebo injections were given first. Those who received placebo first had a significant response to vitamin B12 in terms of general well being (p = 0.006) and happiness (p = 0.032). Improvements in fatigue (p = 0.09) and appetite (p = 0.073) due to vitamin B12 were of borderline statistical ...

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