Please confirm both statements to continue.
By entering, you agree to our Terms of Service and Privacy Policy. This site sells laboratory reagents strictly for in-vitro research use only, not for human or veterinary consumption.
Drop your email and your code appears right here, along with 250 GPUSA Rewards points ($2.50) banked toward a future order. Independently tested research peptides, dispatched in about 48 hours, shipped within the US.
One email a week, unsubscribe anytime. See our Privacy Policy.
Applies automatically at checkout. Happy researching.
Compounds go to an independent US lab before they reach the catalog, purity by reverse-phase HPLC and identity by mass spectrometry. Where a lot has been tested, its Certificate of Analysis is published on the product page, so you can read the actual result before you order.
Each one ties a measured result to a lot ID you can check against the vial. Open any of them in the COA library before you order.
Not every compound carries a certificate yet. The rest are queued for the next testing round, and the catalog marks which products have one today.
Reverse-phase HPLC
Purity quantified against reference standards. It is the headline number on the certificate.
Mass spectrometry
Molecular identity confirmed. The compound is exactly what the label claims.
Lot-matched COA
A published certificate is tied to one lot ID, not a generic sample. Compare it to the lot on the vial you receive.
Independent third-party lab
Assayed by Horizon Analytical, a US-based laboratory. We don't grade our own work.
99%+ documented purity
The bar a lot has to clear. The measured figure is printed on the certificate, not rounded up in marketing.
Zero fillers
Pure active compound, lyophilized. No binders, no excipients, no filler content.
Synthesized & lyophilized
Produced to a defined specification and freeze-dried to a room-temperature-stable powder, no refrigeration required.
Independently assayed
Samples are sent to Horizon Analytical for HPLC purity and mass-spec identity confirmation.
Certificate published
The COA is archived against the lot ID and posted on the product page for you to check. Certificates live on the site, they are not shipped in the box.
Sealed & shipped
Vials are sealed and shipped discreetly within the US, dispatched in about 48 hours.
A certificate is only useful if you know what to look at. These are the three lines that matter, on ours or anyone else's.
Purity, by HPLC
The headline number. It is measured against a reference standard, and on our tested lots it sits above 99%. A certificate without a method named next to the number is not telling you much.
Identity, by mass spectrometry
Purity says how clean the sample is. Mass spec says what it is. Both appear on every certificate we publish, because a pure sample of the wrong compound is still the wrong compound.
The lot ID, matched to your vial
Every certificate names one lot. Match it to the lot on the vial you receive, and if you want a second check, the lab will confirm a lot number directly.
Anyone can publish a PDF. Independent verification is what separates real transparency from marketing. Genetic Peptides USA is currently one of the top-ranked US vendors on PepAssure, an independent platform with zero paid placements that cross-checks lab reports and spot-tests vendors through anonymous purchases.
Verify us on PepAssureA certificate is only useful if it's specific. Every certificate we publish ties a result to a lot ID you can check, and it sits on the product page before you spend anything. Not every compound in the catalog carries one yet, so open the library and check the one you want before you order.
Horizon Analytical, an independent US laboratory. Purity is measured by reverse-phase HPLC and identity by mass spectrometry, and both results appear on the certificate. We do not grade our own work.
Not yet. 11 of the 34 products in the catalog carry a lot-matched certificate today, and the rest are queued for the next round of testing. Catalog cards with a published certificate show a COA mark, and the product page links to it. If you would rather wait for a certificate before ordering, ask support and we will tell you where that lot stands.
Yes. Match the lot ID on the certificate to the lot printed on your vial. For a second check, you can confirm any lot number directly with the lab at contact@horizonanalytical.com.
No. Certificates live on the product page and in the COA library, so you can read them before you order rather than after. Nothing is printed and tucked into the box.
Browse the catalog, open the certificate on the product you want, match the lot, then add it to your cart. That is the whole idea.
All products sold by Genetic Peptides USA are intended strictly for in-vitro laboratory research and scientific study. They are not for human or veterinary use, consumption, or cosmetic application, and are not intended to diagnose, treat, cure, or prevent any disease.