As well, some people may have allergies or medical conditions that do not allow them to be a good candidate to receive vitamin B12 shots, such as kidney problems, low potassium levels, deficiencies in other vitamins such as iron or folic acid, or just an allergy or sensitivity to vitamin B12 itself
Glutathione S-transferases potential components of anti-schistosome vaccines
You're more likely to have vitamin B12 deficiency if you have a medical condition where your body can't absorb B12 or you follow a strict vegan diet
Along with supplementation, lifestyle and dietary changes are equally as important
750 mcg (0.75 mg) dose in a 10 mg vial: Target 20 units (0.2 mL)
Other Medical Conditions As mentioned, its generally nothing to fret over if a metal mouth subsides within an hour or so