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Overview GHK-Cu (Glycyl-L-Histidyl-L-Lysine Copper complex) is an endogenous tripeptide that binds copper(II) ions with high affinity and is present in human plasma at concentrations that decline markedly with age from roughly 200 ng/mL at age 20 to approximately 80 ng/mL by age 60
Free Radical Biol Med 175:117
Effects on MAPK activation and neutrophil migration
The vegans averaged 0.76 grams of protein per kilogram of body weight per day (roughly 10% of daily calories from protein), while the Calorie Restriction members averaged 1.73 grams (roughly 24% of calories from protein)
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