Quality & Verification
Our quality and testing standard
Last updated: July 3, 2026
For more context on documentation standards, see the Curo library guide to evaluating peptide purity and batch documentation.
Quality is only meaningful if you can check it. Curo's approach is built around that idea: every lot is tested by an independent laboratory, and the results are published per lot so you can verify them rather than take a claim on faith.
Curo products are for Research Use Only and are not intended for human or animal use.
What we test for
Each lot is analyzed across the dimensions that matter for a research peptide:
- Identity confirms the material is the peptide it claims to be, not a different or mislabeled sequence. This is where mass-based analysis such as LC-MS does its work, matching the molecule against its expected mass.
- Purity measures how much of the material is the target peptide, reported by HPLC as a percentage. Curo's published lots have carried purity in the high-99% range.
- Fill and potency verify the net peptide content against the labeled amount, so the number on the label reflects what is in the vial.
- Endotoxin screens for bacterial endotoxins, pyrogenic byproducts of bacterial cell walls, reported against a limit where available.
Together these answer the four questions that matter most before a study begins: is it the right molecule, how pure is it, how much is there, and is it clean.
Two more panels are being added:
- Sterility (coming soon): screening for microbial contamination.
- Heavy metals (coming soon): screening for trace metal contaminants.
Independent testing
Curo's primary analytical laboratory is BT Labs, along with other US-based independent labs. Testing outside the storefront matters because it means the results are not self-reported. Each published certificate links back to the testing lab so the result can be confirmed at its source.
Published per lot, verifiable by you
The testing only counts if the paperwork is specific. Curo releases every lot against its own lot-specific Certificate of Analysis, and every vial is marked with a QR code and its lot number so you can pull the certificate for that exact lot.
That gives you a direct line from the vial in your hand to the lab result: scan the code to open the certificate library, match your lot number to its report, and follow the verification link to confirm the numbers at the lab. For the full walkthrough, see Certificates of Analysis: how to verify your lot.
Why it is built this way
A peptide's name on a vial does not settle its identity, purity, or cleanliness. The same name can come from very different supply chains and quality systems. Independent, per-lot, verifiable testing is how Curo closes that gap, so the decision to trust a batch rests on published evidence rather than a brand promise.