An independent intelligence board aggregating credible research, preprints, clinical findings, biohacking experiments, and community discussions on therapeutic peptides, longevity science, and evidence-based anti-aging. Stories are scored for relevance, credibility, novelty, momentum, and practicality so the most important findings surface first.
Someone posted a warning saying their skin around injection sites stayed damaged for months after using a peptide called GHK-Cu (sometimes sold alone or mixed with other peptides like BPC-157 and TB-500 as “glow”). They say they stopped injections two months ago, diluted the vials as much as possible, took zinc supplements up to 75 mg/day, and will never inject it again. The post reads like a personal account asking if others had the same problem. GHK-Cu is a small piece of a protein (a peptide) that naturally occurs in the body and can bind copper. In lab studies it’s been linked to wound healing, skin repair, and collagen production. Companies and hobbyists sell it in vials for topical use or injection, and some people mix it with other peptides such as BPC-157 and TB-500, which are also promoted for tissue repair. These are not prescription drugs with standardized dosing and oversight in most places; many people using them are self-experimenting. The report is an anecdote — a single person’s experience — not a controlled study. They describe prolonged problems at injection sites after using several vials over an unspecified time. From the snippet we don’t know exact doses, injection technique, sterility, or which compound (GHK-Cu alone or the mixed “glow”) caused the issue. Because it’s one person’s story, it can’t prove GHK-Cu causes this routinely, but it does raise a red flag that something went wrong for that user and lasted for months. Why it matters: many people curious about peptides assume “natural” equals “safe,” or that mixing and injecting small peptides is harmless. This post suggests otherwise — either the peptide, impurities, poor injection practice, or interactions (including with high-dose zinc) might lead to lasting skin damage. If you’re considering peptide injections for cosmetic or healing purposes, this is relevant. It’s a reminder to be cautious about sourcing, technique, and the lack of clinical oversight for these products. Caveats and risks: a single online report can’t identify the cause. Skin problems at injection sites can come from infection, an allergic reaction, chemical irritation, contamination, incorrect dilution, or poor injection hygiene. High zinc intake (75 mg/day) can have side effects and can disrupt copper balance, which is relevant because GHK-Cu binds copper; the poster’s routine of heavy zinc supplementation could have played a role, but the snippet doesn’t prove that. Peptides sold unofficially are often unregulated and may contain impurities or incorrect concentrations. If you have unexplained skin damage or systemic symptoms, see a healthcare professional. Avoid self-injecting unregulated products, and don’t rely on one person’s story as proof either way. Bottom line: a user reports months-long injection-site damage after using GHK-Cu or a peptide mix — it’s an anecdotal warning, not a study, but a good reason to be cautious about injecting unregulated peptides.
Source: r/Peptides