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National health data, such as findings from the National Health and Nutrition Examination Survey (NHANES), highlight the public health significance of vitamin B12 deficiency, showing patterns of intake and prevalence among different demographic groups
Very rarely, more serious reactions can occur, such as a severe allergic reaction
Placebo effects, expectation bias, and individual variability all confound interpretation
Hormone Research, 53(6), 274-278
Administered intramuscularly or intravenously under medical supervision
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