A friend who does amateur bodybuilding told me about research peptides and specifically mentioned GHK-Cu for tissue repair

Key Takeaways Two completely different testing worlds: workplace drug screening and anti-doping testing share a name and almost nothing else Standard panels do not look for peptides: the SAMHSA/DOT 5-panel screens for marijuana, cocaine, amphetamines, opioids, and PCP no peptide is on it Anti-doping testing does look for peptides: WADA's Prohibited List category S2 covers GHRH analogs, GHRPs, GH secretagogues, EPO and other peptide hormones WADA's S0 category is a catch-all: any pharmacological substance with no current regulatory approval for human therapeutic use is prohibited at all times, which is how compounds like BPC-157 are covered This article is not a timing guide: it explains which testing regimes exist and what they are designed to find, not how to avoid any of them "Do peptides show up on drug tests?" is one of the most common questions asked about research peptides, and it produces a lot of bad answers because the question contains a hidden ambiguity

4.5.3.3 Current validation framework status Although numerous studies employ area under receiver operating characteristic curves exceeding 0.8 as diagnostic performance criteria, validation data from independent external cohorts remain insufficient
Dramatic Improvement (Week 5-6): Most users see significant brightening by week 6