does ghk-cu block dht for Skin & Wound Healing: Current Evidence GHK-Cu Peptide for Hair Growth:

found no significant differences in GH pulse frequency across a 24-hour period between groups with normal GH secretion and those with isolated GHD, noting between eight and eleven GH pulses in both groups

Arch Dermatol Res 301:357365

That being said, the findings indicated that there was a dose-dependent relationship between administration of the nootropic and the recorded escape latencies [2]

Peptide Capsule Storage GHK-Cu capsules should be stored in a dry, cool location away from sources of moisture or heat

But a careful reader should understand which parts of the case rest on RCT evidence and which parts rest on mechanism plausibility