Don’t Trust Us. Test Us.
Most vendors tolerate independent testing. We pay you to do it.
The only way to truly verify purity is independent laboratory analysis. Not our word, not our certificate, not a logo on a page. An independent lab, testing the vial you actually received.
We are confident enough in what we ship to put that to the test, literally. So we will replace any vial you send out for testing, free of charge, pass or fail.
The Third-Party Testing Reward Program
- Get your USA Made Peps product independently tested by a third-party laboratory.
- Post the full, verifiable results publicly on an accepted research community platform.
- We replace the vial you sacrificed for testing, free of charge. Pass or fail.
Read that third point again, because it is the part other suppliers will not offer. We replace the vial even if the result is not what we hoped. A guarantee that only pays out when the news is good is not a guarantee, it is marketing. Full program details are in our Returns & Testing Policy.
We believe transparency raises the standard for everyone in this industry. If more vendors backed their products this way, researchers would be better protected and the science would be better served.
Every lot. Published. Before you ask.
Every batch we sell is tested by an independent third-party laboratory, and every certificate is published to our lookup tool. Not a representative sample. Not a certificate from a batch we chose to show you. Every lot, including our worst one.
Type the lot number from your vial into our COA Lookup tool and you will get that exact batch’s purity result and the certificate as a downloadable PDF. You can do this before you buy, using any lot number listed there, or after your vial arrives.
If you are not sure how to read a certificate of analysis, we wrote a guide for that: How to Read a COA. It explains what purity actually measures, what endotoxin testing is for, and which parts of a certificate matter.
Published before it ships
Here is the part that matters more than the promise itself: the certificate goes up before the vial is in our hands.
When we order a batch, the laboratory results come back to us about 24 hours later, and we publish the certificate then. That is before the shipment reaches our facility, which means it is before the product could possibly reach you. By the time you open the box, the lot number printed on your label is already sitting in the lookup tool, waiting.
The order of operations is the entire point. A supplier who publishes after the product ships keeps the option, at least in principle, of sending it out first and deciding later which results are worth showing. Publishing first takes that option away from us. We would rather not have it.
Try the lookup with any lot number, including one you have not bought.
The trade we make
We do not keep deep stock. We source a batch, an independent laboratory tests it, we publish the certificate, and it ships. That costs a day or two on delivery, and we are not going to pretend otherwise.
Here is what it buys you. An old certificate is an accurate record of what a material was on the day it was tested. It says less about what is in the vial today. The closer that test date sits to the day the product reaches you, the more the number on the certificate is actually telling you.
We are not going to claim a newer vial is more potent. Properly stored lyophilized peptide is stable for a long time, and we have no way to see inside anyone else’s freezer. What we will claim is narrower and checkable: our certificates are recent, our shelf life is long, and both of those numbers are printed on the certificate you can look up right now.
That is the trade. A day or two in transit, for a certificate measured in weeks rather than years. We would make it every time.
Our purity guarantee
Our guaranteed minimum is 98.0% chromatographic purity, measured by reversed-phase HPLC at 214 nm and calculated by area normalization, which is the method our certificates use. If a valid, independent third-party test shows any USA Made Peps product below that within 30 days of purchase, we replace it free of charge.
You may notice our published lots run comfortably above that number. That is deliberate. We set the guarantee below our typical results because independent laboratories legitimately differ when measuring the same material, and we would rather absorb that variation than argue with a customer about a tenth of a percent.
Why we operate this way
USA Made Peps is a disabled veteran owned business. Our catalog is deliberately short, because we only carry what we can stand behind. Everything we sell is made in the United States and tested before it reaches you.
That is the whole model. A short list, made here, tested every time, with the results published whether or not anyone asks to see them. If that is the kind of supplier you have been looking for, the catalog is below. If you would rather check our work first, the lookup tool is open to everyone.
Browse the catalog | Verify a lot number | More about us
All products are sold strictly for Research Use Only. Not for human or veterinary use, diagnosis, or treatment.