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GHK-CU causing tinnitus?

8 replies3 peopleFeb 3, 2026☆ Follow
Summary

Does GHK-Cu injection cause immediate tinnitus, lightheadedness, or injection site reactions?

One user reported sudden dizziness and loud ear ringing right after their first 1.6 mg GHK-Cu shot that faded within minutes, with only minor tingling at the site. Others noted similar transient effects are sometimes linked to vasodilation or histamine response, while injection pain varies widely from none to lasting a full day. A protocol involving split doses and a massager helped one person finish a vial, and adding lidocaine eased it further. The second dose produced no tinnitus or nausea, only mild itch and temporary facial redness managed with zinc.

What this discussion establishesStill open

Whether the initial reaction was caused by the peptide, anxiety, or injection technique.

Nothing here is advice.

8 replies · 3 people
SlowSignal13archiveopening postFeb 3

I gave myself the first 1.6 mg shot of GHK-Cu. I felt nervous going in because of all the talk about stinging and burning. So far I only notice a faint tingle and the needle itself caused no pain. Straight after though I got dizzy and my ears started ringing loudly. Has this happened to anyone else? It might just be nerves but it made me uneasy. Never got that after using reta.

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LevelLedger10archiveFeb 3

Was the GHK-Cu used on its own or part of a GLOW or KLOW mix? I ask because several people have said BPC-157 worsened their tinnitus and that peptide is in those blends. So far I have not come across any cases of GHK-Cu by itself triggering it.

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SlowSignal13archiveFeb 3
↳ replying to @LevelLedger10

It was straight GHK-Cu. I mixed 50 mg with 3 ml of bac water. The ringing stopped after a few minutes. The spot is a bit red now and the tingle is almost gone, with no burning so far.

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LevelLedger10archiveFeb 3

Good to hear it passed. Reactions to GHK-Cu differ a lot: some feel nothing, others compare it to a wasp sting, and for me it felt like a butter-knife stab that lasted twenty-four hours. Splitting the dose into three shots plus using a percussion massager got me through the first vial, though I doubted I would continue. Adding a bit of epi or lido to the bac water finally made it workable.

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SlowSignal13archiveFeb 3
↳ replying to @LevelLedger10

That sounds exactly like what I was worried about. Some people quit after one try because the pain was so bad. I seem to be lucky so far since I feel almost nothing. I wonder if tomorrow’s dose will feel different. Glad you found a way to keep going though, it must be worth it.

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SlowBramble78archiveFeb 3
↳ replying to @SlowSignal13 (opening post)

I came across this online and thought it might help. Light-headedness and ringing right after the shot is not uncommon with GHK-Cu and is usually mild and short. Common explanations from user reports include a quick drop in blood pressure from vasodilation, a mild histamine response causing flushing and ringing, an adrenaline surge from nerves about the first injection, or pushing the liquid in too quickly so it reaches circulation fast.

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SlowSignal13archiveFeb 3
↳ replying to @SlowBramble78

Thanks, that was useful and interesting. I will keep those points in mind for the next injection.

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SlowBramble78archiveFeb 3
↳ replying to @SlowSignal13

No worries. I am about to start GHK-Cu myself and have been looking up whatever information I can find.

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SlowSignal13archiveFeb 4

Quick update after the second dose: no ringing, no nausea, and the shot was painless. Just a slight itch now. My face looked a bit dry and red today, but I am still taking my usual zinc.

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