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too much b12 injections for Energy: How do they work? B12 Injections | Energy &
Description
PMID: 18454811.

Only a handful of people Sinha pointed to a recent study published in the online journal of JAMA which found an association between high intakes of vitamins B6 and B12 and hip fractures in older women

A.DiegelmanP.et al (2007)

These reactions can be life-threatening and require immediate medical attention

Fatigue, lightheadedness, and overall weakness are the most common symptoms of low B12
