how much b12 is in the injection Benefits of Injections for Optimal Health Cyanocobalamin (B12) Injection 1000 mcg/mL,

This means it has not undergone FDA review for safety, efficacy, or manufacturing quality , and it cannot be marketed or sold legally as a dietary supplement or medication for human consumption

Further, it activates muscle stem cells, promoting tissue regeneration, and reverses insulin resistance in relevant animal models, all with good systemic tolerability 1,2

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Front Biosci (Landmark Ed) 2009;14:298395

However, subsequent analysis showed that 500mcg produced nearly identical results to 1mg in body composition changes

AOD 9604 clinical trials showed a tolerability profile statistically indistinguishable from placebo