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Nature Medicine 21(8):887-894

The compound shows high enzymatic selectivity, preserves lean mass, and engages longevity-related pathways (e.g., SIRT1), but remains a nonFDA-approved research substance that is WADA-banned and should be used under medical guidance

Although doctors may recommend B12 injection for this purpose when weakness is related to peripheral neuropathy, more research is needed on effectiveness, and Medicare doesnt consider this medically necessary

The injections themselves do not permanently change your metabolism

For instance, regular B12 shots in McKinney might help a patient wanting to address a deficiency caused by chronic illness

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