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Too low and it loses bacteriostatic efficacy meaning microbial growth becomes a real possibility in a multi-use vial

Low levels of B12 can lead to: Fatigue Weakness Digestive issues Shortness of breath Numbness or tingling in the fingers and toes Difficulty walking / balance problems Cognitive impairment or memory loss A person can also have low levels of vitamin B without exhibiting any obvious symptoms

Clinics must convert the administered dose in grams or milligrams to the number of 500mg units for accurate billing

You have Stokes-Adams syndrome, Wolff-Parkinson-White syndrome, or cardiac block without a pacemaker

The optimal level of homocysteine in functional medicine is below 8 mol/L, with an ideal range between 5-7 mol/L