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Research shows that low B12 levels are associated with increased body fat, disrupted fat processing and insulin resistance, highlighting its role in maintaining metabolic balance
routine use in replete patients has limited evidence
[153] There is evidence that for elderly people, physicians often repeatedly prescribe and administer cyanocobalamin injections inappropriately, evidenced by the majority of subjects in one large study either having had normal serum concentrations or having not been tested before the injections
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