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But not everyone who feels tired is B12 deficient, and not everyone with low B12 requires an injection
Most people feel a lift after a B12 shot, but a minority feel briefly worse
Researchers gave participants either a placebo or 1,000 mcg of vitamin B12 daily for eight weeks
It is often used as 'pyridoxine hydrochloride'
They share the same active peptide moiety, but their molecular formula, total material mass, counterion contribution, water content, and batch assay may differ
All studies are restricted to laboratory and research environments
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