GHK-Cu side effects
Across 496 first-hand reports, people mentioned a side effect 100 times (about 20 per 100 reports). The most common: injection site, redness, stinging. User reports show what people notice — they can't tell you whether GHK-Cu is safe for you.
High-risk compound. Not an approved supplement; serious and sometimes irreversible risks, banned in sport, may be restricted where you live.
Reported side effects
injection site47
redness13
stinging11
injection pain8
burning8
pain7
bruising4
copper uglies2
What got worse for some people
In their own words
“I've injected hgh + GHK-cu together. Taken fo-ti. Didn't have that effect.”
“The changes in my hair have been great, the growth rate has accelerated, the texture has improved, and there’s a noticeable shine that wasn’t there before.”
“I haven't gotten sick since I started it, my hair is thicker than ever, my skin looks 10 years younger, I'm less swollen overall from a decrease in inflammation, and I feel like my brain works twice as fast.”
“I’ve been taking GHK-Cu, BPC-157, and TB500 over the past month and feel a lot better. Can’t comment on which did what but I definitely feel healthier.”
“My joints tend to feel nice and silky when I’m on it as well, and my skin quality was improved overall as compared to when not using it.”
“I noticed that my eyelashes grew in longer and I guess thicker... I have not had one single eruption since I did my one month cycle. All cysts have healed.”
Is GHK-Cu safe? What the research covers
CResearch: Limited0 meta-analyses · 1 randomized trials on PubMed
None of the top reviews we found focus on safety. All research on GHK-Cu.