What side effects are associated with GHK-Cu?

Across 166 first-hand community reports, the most-mentioned side effects themes for GHK-Cu are: injection_site_reaction, application_site_reaction, insomnia, water_retention, fatigue. These are aggregated community experiences with linked sources — not medical advice or clinical findings.

Educational use only — not medical advice

Community-reported · 166 reports

GHK-Cu side effects

Aggregated from first-hand community reports with linked sources. Educational only — community experience is not clinical evidence or medical advice.

injection_site_reaction
26 mentions
source 1 source 2 source 3
application_site_reaction
11 mentions
source 1 source 2 source 3
insomnia
4 mentions
source 1 source 2 source 3
water_retention
2 mentions
source 1 source 2
fatigue
1 mention
source 1
hair_thinning
1 mention
source 1
mood_changes
1 mention
source 1