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Comparative Mechanism Summary# Combination Considerations# No controlled studies have evaluated combinations of GHK-Cu with any of the peptides described above
It is studied as a selective inhibitor of nicotinamide N-methyltransferase (NNMT), an enzyme linked to metabolic and oncogenic pathways in research models
But one common question still remains when should you actually take it
doi:10.1111/j.1749-6632.2000.tb06193.x
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