Welcome to Lab Testing — read this first

**Welcome to Lab Testing.** **Lab Testing** covers third-party verification — HPLC, mass spec, endotoxin, reading and interpreting COAs, label-vs-tested differences, and which independent labs you trust. **Ground rules to keep this place useful:** - This is a research-context forum. Discussions are for educational and research purposes only — not human medical advice, not a substitute for a clinician. - Be specific. If you're sharing an experience, include the practical detail: vendor name (where relevant), reconstitution math, observed effect, timeline. - Be respectful. We argue about data here, not people. - Cite sources when you can — links to PubMed, COA PDFs, lab reports, or your own measurements all welcome. - Don't post solicitations, undisclosed affiliate links, or anything that's clearly an ad. For the full posting guidelines see our editorial policy and the research-use disclaimer linked from the footer. **Getting around:** - Browse threads by tag (e.g., `#bpc-157`, `#semaglutide`, `#coa`) at the top of any thread. - Vendor pages live at `/vendors` — every vendor we cover has lab data and a review thread linked from there. - New to peptides? The Beginner Questions category is the friendliest place to start. Thanks for keeping the signal-to-noise ratio high.