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Several factors influence the appropriate dose of vitamin B12, including the severity and underlying cause of your deficiency, your age, overall health status, and your bodys ability to absorb vitamin B12 from food or oral supplements
J Clin Endocrinol Metab
Normal B12 levels are 400 picograms per milliliter
: Those struggling with chronic fatigue, mitochondrial dysfunction, or metabolic concerns may benefit most from adenosylcobalamin
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