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Br J Nutr 110:14211428

Physiological Rev

GHK-Cus mechanism depends on gradual tissue accumulation over the cycle, not on high single-day concentrations
The FDA also highlights safety concerns regarding certain bulk substances used in compounding, as well as broader compounding risks

Given the widespread psychological acceptance of vitamins as a relatively safe and economical natural compound, their utilization should be encouraged in regions with positive clinical data
