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doi: 10.1016/j.jsbmb.2008.06.010

Methylcobalamin Cyanocobalamin : Synthetic, contains a cyanide molecule, requires liver conversion before use

Preserves physiologic feedback, reducing risk of supraphysiologic GH or IGF1 levels compared to exogenous GH [6]

Furthermore, Sucrosomial B12 was well-tolerated, with no reported side effects, serious adverse events, or treatment-emergent effects, no negative effect on the vital signs, confirming its excellent safety and tolerability

No completed randomized controlled human trials exist for any indication as of 2026

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