Frequently Asked Questions
The short version of how PeptideMeter works. For the detail, see About and our testing methodology.
PeptideMeter is an independent testing project. We purchase peptides and related compounds from vendors, send them to accredited commercial laboratories, and publish every result — pass or fail. We are not a vendor and we do not sell peptides. Our goal is to make an unregulated market safer through transparency.
Each sample is scored from 0 to 10 based on a combination of identity, purity and quantity relative to the label claim. A score of 6.0 or above earns an A; the scale steps down through B, C and D to E for samples that fail outright. See our testing methodology for the full rubric.
A (Great, 6.0–10.0) and B (Good, 5.0–5.9) are solid results. C (Fair, 4.0–4.9) signals moderate concerns. D (Poor, 2.0–3.9) and E (Bad, below 2.0) indicate significant problems — underdosing, impurity, or in the worst cases a sample that does not contain the advertised compound at all. X means we do not yet have enough data to rate.
A vendor's rating range shows the best and worst grades across everything we have tested from them. A vendor showing "A to E" has sold at least one excellent batch and at least one failing one — consistency matters, so we surface the full spread rather than a single flattering number. Vendors with wide spreads appear on our red-flag watchlist.
Samples are processed by a rotating panel of independent commercial labs, identified on each result as Lab A through Lab G. Rotating and blinding the labs reduces the chance of any single facility biasing a vendor's outcome.
Yes. PeptideMeter offers free analysis for community-submitted samples of supported products. Fill in the free sample test form, ship us the vial, and we publish the lab result for everyone's benefit. Paid testing is available for additional compounds and for endotoxin/contamination panels.
Participating vendors print a PeptideMeter batch code on the vial or certificate. Enter it on our batch verification page (or the quick lookup in the footer) to confirm the lot was tested and passed QC. A missing match does not prove a product is fake — the batch may simply not have been submitted yet.
Results are added continuously. The figures on the site reflect the database as of late May 2026; the most recent lab results appear in the "Fresh from the lab" strip on the homepage and on each vendor's page. Older tests are retained so you can see how a vendor's quality has changed over time.
No vendor can pay for a better rating. We test products for free as part of our vendor support program, and a participating vendor receives the same scrutiny as any other. Ratings reflect lab data only.
No. Everything on PeptideMeter is provided for educational and informational purposes only and is not medical advice. Nothing here has been evaluated by the FDA or any regulatory authority. Always consult a licensed physician before using any compound.