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Someone who buys peptides for research sent samples from a supplier called PEPS to an independent lab for testing. The lab results showed that what was labeled as 50 mg of GHK-Cu actually contained only 20 mg. The poster suspects this shortfall is common and says many batches are being sold with less GHK-Cu than advertised. They urge others to get their products tested or be careful when buying. GHK-Cu is a small peptide that naturally occurs in the body in tiny amounts and is sometimes used in skin and wound-healing research. The “Cu” part means it’s bound to copper, which helps the molecule do certain biological jobs. People who use peptides in labs or buy them for experimental cosmetic or research mixes expect a known amount of peptide per vial so they can measure doses and study effects. It’s not a drug sold for treating people over the counter; it’s primarily handled by researchers and hobbyists. The claim here is about quantity and honesty, not a new medical result. The independent test found much less GHK-Cu than the label claimed — 20 mg instead of 50 mg in one batch. That’s a simple chemical analysis, not a human trial. It doesn’t prove every vendor is doing this, but it does show at least one supplier provided a product with less active ingredient than advertised. The magnitude of the discrepancy is large: less than half the claimed amount in this sample. This matters because people who buy peptides rely on accurate labeling. If you’re preparing solutions, mixing blends, or trying to reproduce research, a shortfall changes the dose and could make experiments fail or give misleading results. For consumers using peptides in cosmetic DIY projects, it means you might not get the effects you expect. For anyone paying for high-cost ingredients, it’s a financial concern: you’re not getting what you paid for. Caveats are important. The report is from a single submitted sample and a single independent test; it’s not a broad, systematic investigation. The post is user-submitted and somewhat speculative about how widespread the problem is. Also, GHK-Cu is generally not approved or regulated as a medicine for home use, and purity/sterility standards can vary widely among sellers. If you’re buying peptides for research, the safest path is to source from reputable suppliers, ask for certificates of analysis, and consider independent lab testing if you need to be sure. People should not assume these products are safe or appropriate for self-administration. Bottom line: one tested sample of GHK-Cu was significantly under-dosed versus its label, so buyers who need reliable amounts should verify suppliers or get their batches tested.
Source: r/Peptides