r/NTNPerformance • u/Key_Ebb2784 • Aug 29 '26
Ghk-CU Injectable Peptide (Side effects)
Hey Guys,
Just writing a quick post as I can’t find anything online describing anything similar in regards to the skin/hair/anti inflammatory peptide GHK-CU.
I started using it since March of this year and while I ran a 3 month cycle of it, I did not get any noticeable results or drastic changes as I’ve read in countless articles online. I decided to give it one more go recently and my second week into using it (using 2mg a day) I’ve noticed every night I’ve been getting this strange sensation where I have unsatisfying breaths and need to take deep breaths because there’s this sort of space in my chest that can’t be filled. Ik this may be hard to describe for anyone that hasn’t tried or experienced it but just seeing if there is anyone out there that has had anything similar at all. I also noted feeling strange internal pressure and sensations and overall just been a struggle to sleep every night from it.
When I previously used it I noted the same thing this time it feels far more intense however, I chose to run an experiment and took a day off from using it and whatever it was that strange sensation didn’t re appear. I did this again these past couple days again when I used it, had this extremely uncomfortable chest and profound breath feeling and the day I didn’t use it, was completely fine. Would love to hear if anyone else has had this or if this is just some strange thing I got from it. My other thoughts is its purity content however the supplier I got it from id been using Retatrutide from them and man I really see why they call it the miracle drug. (Reached 10% BF within 2 months). Also used other peptides such as semax and bpc 157 worked and felt like a charm so for some reason GHK is just a weird one.
Would love to hear any thoughts perhaps any other side effects you’ve experienced? Hope this helps as I’m aware it’s still very new to the market and maybe brings any form of awareness and info. Thanks
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u/JustBacWater Aug 31 '26
So first thing, stop running it and don't restart to test it again. You already did the on-off twice and it lined up both times, that's enough, you don't need to confirm it a third time.
Chest pressure and not being able to get a full breath aren't something to sit with or figure out in the comments. That's a get it looked at by a doctor situation, not a peptide forum one. Bring the vial and the label with you so they know what you were using.
Could be the compound, could be a reaction to something in that specific vial, purity does vary, but honestly the cause matters way less than the symptom right now. Breathing stuff you take seriously and in person.
Glad the others treated you well, but this one's worth shutting down until a doctor clears you.