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What the evidence does support is this: B12 deficiency causes fatigue and neurological symptoms, and correcting deficiency in people who are deficient improves those symptoms
After a few sessions, they notice improved stamina, better mood, and enhanced productivity throughout the day
Vitamin B12 deficiency occurs when the body lacks sufficient cobalamin, an essential water-soluble vitamin required for numerous physiological processes
These were described in conference abstracts and later reviews, but not published as full papers
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