is oral b12 as effective as intramuscular injections Frontiers Sandoz Vitamin B12 Injectable Solution

Is the injection painful

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Furthermore, some of the injections allegedly took place on dates when the clinic was closed, or when the patient who supposedly received the treatment was actually incarcerated in federal prison

Although both substances show nerve-damaging properties in cell experiments, it is still uncertain how much these come into effect in biological concentrations

PMID 16042604