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b12 injections and bodybuilding Mike O'Hearn -Should You Inject | MUST WATCH injecting vitamin b12 bodybuilding B12
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No recent b12 testing

AHK-Cu research is more limited but more focused

Adults usually get 100 mcg monthly, but this can change based on individual needs and the doctors advice

[DOI] [PMC free article] [PubMed] [Google Scholar] 47

The researchers described these effects as "relatively mild, predictable, and reversible renal injury and altered tubular function." That description is accurate but perhaps understates the significance of what they observed
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