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A person posted they’ve been feeling dizzy, foggy-headed and like the world isn’t real (called derealization) for more than two months after a short course of a peptide called GHK‑Cu. They say they took it for nine days — 1 mg a day for six of those days — and their symptoms started afterward. This is a single self-report from an online forum, not a clinical trial or a group study. GHK‑Cu is a small protein fragment that naturally occurs in the body and binds copper. In scientific literature it’s been studied for wound healing, skin health and some cell-level effects. People in the supplement and peptide community sometimes use lab-made GHK‑Cu hoping for skin or repair benefits. It’s not the same as a common prescription drug like Ozempic; it’s more of a research peptide. Because it’s not a widely approved medicine for these uses, information about dosing and long-term effects in humans is limited. What we actually have here is an anecdote: one person reporting persistent neurological symptoms after using GHK‑Cu briefly. Anecdotes can be helpful for flagging possible problems but can’t prove cause and effect. There’s no controlled comparison, no medical workup in the post, and we don’t know other important details like other medications, underlying conditions, or exactly how the peptide was made and administered. In the scientific literature I’m aware of, there aren’t robust human studies linking short courses of GHK‑Cu to long-lasting dizziness or derealization, so this report is concerning but far from conclusive. Why this matters is straightforward: people experimenting with research peptides can run into unexpected side effects. If a supplement or peptide seems to trigger prolonged brain fog, disorientation or balance issues, that affects daily life and safety, and it’s a reason to stop the substance and seek medical advice. Clinicians and regulators pay attention to these reports because repeated similar reports can prompt formal investigation. For anyone using peptides or considering them, this is a reminder that “natural” or “research” doesn’t mean risk-free. There are several important caveats. One anecdote can’t tell us whether GHK‑Cu caused the symptoms, whether the batch was contaminated, whether there was an interaction with other drugs, or whether an unrelated health problem started around the same time. People with serious or persistent neurological symptoms should see a healthcare provider promptly. Because GHK‑Cu is largely unregulated as a consumer product in many places, quality and purity vary. Pregnant people, those on other medications, or anyone with a neurological condition should be especially cautious. If you’re using or thinking of using peptides, get medical guidance and consider lab testing rather than relying only on forum advice. Bottom line: a single online report links brief GHK‑Cu use to months of dizziness and derealization, but it’s an anecdote that raises a red flag rather than proof of harm; consult a clinician and be cautious with unregulated peptides.
Source: r/Peptides