Do not use if pregnant, nursing, or taking medication without consulting a healthcare professional
While even extremely high doses of GHK-Cu are unlikely to cause any adverse reactions, Pickart has estimated that the peptide can produce toxic action and start lowering a subjects blood pressure starting from an astronomical dose of about 22,500mg [13]
The Khavinson primate studies are most relevant here: Epitalon increased nighttime melatonin in old monkeys while having no effect on young ones
What's the connection between adipose NNMT and obesity
Korkushko OV, Khavinson VKh, Shatilo VB, Antonyk-Sheglova IA
This may be at room temperature [20-25C (68-77F)], refrigerated [2-8 C (36 -46 F)], or frozen [-15 to -25C (5 to -13F)]