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These reactions contribute to metabolic efficiency

This past May, Science retracted a paper it had published just five months earlier

Fang J, Wu Z, Cai C, Wang Q, Tang Y, Cheng F

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Common lifestyle factors contributing to deficiency include: High levels of stress or anxiety Strenuous exercise routines without adequate nutrition Frequent travel or irregular meal patterns If youre encountering fatigue, brain fog, or prolonged physical or mental exhaustion, it may be time to check your B12 levels