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Safety and Supervision B12 is water soluble, so excess is generally flushed out
Very rarely, more serious reactions can occur, such as a severe allergic reaction
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
Hormone Research, 53(6), 274-278
Placebo effects, expectation bias, and individual variability all confound interpretation
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