The discrepancy is too large to be dismissed as a chance finding, suggest the researchers, but could be the result of publication biassome studies might have been prioritized for publication because of the positive nature of their results whereas the unpublished datasets used in this study would not have been affected by any failure to publish null results
Start on a daily multivitamin as well as 400 mcg folic acid and keep it constant to reduce the variability while monitoring your b12
The truth is more nuanced
Without enough B12, individuals can develop anemia, leading to symptoms like tiredness, weakness, and a noticeable drop in energy levels
To help prevent B 12 deficiency, encourage all individuals to consume a diet with sufficient B 12
However, markedly elevated levels without supplementation may warrant GP review to exclude underlying conditions such as haematological disorders, liver disease, or renal impairment