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J Neurol Neurosurg Psychiatry 91:795808

doi:10.1016/j.pnpbp.2007.10.020 Barbadoro P, Annino I, Ponzio E, et al

The effects of estrogen priming and puberty on the growth hormone response to standardized treadmill exercise and arginine-insulin in normal girls and boys

However, the safety data from decades of human use in clinical settings has not shown significant adverse effects
GHK-Cu was part of that broader discussion, and the FDA later updated its bulk drug substance list

Kumari P, Srivastava A, Banerjee R, Ghosh E, Gupta P, Ranjan R, Chen X, Gupta B, Gupta C, Jaiman D, Shukla AK (2016) Functional competence of a partially engaged GPCR-ARRESTIN COMPLEX
