The best way to correct a deficiency of Vitamin B12 is through a Vitamin/Nutrient IV that contains vitamin B12 and/or via vitamin B12 injections
rather, you should stay at a lower dose if its working, with no side effects
However, if you already have low B12 levelsas determined by a urine or blood testusing B12 supplements or eating foods with vitamin B12 may be helpful
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Unlike oral supplements, which may lose potency during digestion, injections deliver essential nutrients directly into the bloodstream for faster absorption and greater bioavailability
Elena M-M, Slvia P, Georgia E et al (2011) MicroRNA profiling of Parkinsons disease brains identifies early downregulation of miR-34b/c which modulate mitochondrial function