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[10] Enzyme-inducing anticonvulsants such as phenytoin, carbamazepine, and phenobarbital, as well as rifampicin, accelerate hepatic catabolism of vitamin D, shortening its half-life and potentially necessitating more frequent or higher intramuscular doses to sustain target 25-hydroxyvitamin D levels

GHK-Cu and Gene Expression Reset Glycyl-L-histidyl-L-lysine copper complex represents one of the most extensively researched regenerative peptides with over four decades of scientific investigation

Annals of the New York Academy of Sciences (2010) Crockford D Annals of the New York Academy of Sciences (2007)

The copper chelation component appears essential for this activity