WADA does not currently list GHK-Cu as a prohibited substance, although athletes are typically advised to confirm current prohibited-substance lists for their sport
One reason for this is that the level of glutathione will fluctuate throughout the day from its lowest in the early morning to depletion from routine exposure to toxic substances (like alcohol), pathogens, cigarette smoke, car exhaust, drugs, certain foods, stress level, illness, and many similar factors, so repeated testing could be required to set a baseline
What is traditional HGH
Cao FB, Wang NB, Zhang M, Dai HX, Dawood M, Zhang GP, Wu FB
Much of the research is preclinical, so we'll always frame expectations honestly