How we test
Third-party labs. HPLC and MS. Lot numbers you can look up. That is the whole story.
Costides publishes lot Certificates of Analysis with HPLC purity and mass spectrometry identity when those documents are released for a pack.
Wholesale and group-order lots may rely on customer or group testing under published policy. Pages describe paperwork and identity checks, not dosing.
| Methods | HPLC + MS when on CoA |
|---|---|
| Where | Product page + CoA library |
| Scope | Lot identity, not dosing |
Procedural trust means numbers on a Certificate of Analysis, not adjectives on a homepage. Published lots carry purity and identity data from laboratory methods. Documents support laboratory records. They are not therapeutic claims.
HPLC purity
High-performance liquid chromatography reports purity for the lot when that assay is included on the published CoA. Read the percentage on the document, not marketing copy.
Mass spectrometry
Mass spectrometry confirms identity against the expected molecular weight for the compound on the label. Matching mass supports chemical identity for research use. It does not authorize human or veterinary administration.
Lot numbers
Every published pack carries a lot number. Enter that number on the verify page to pull the matching CoA when it exists. Same lookup we use on the floor.
What a CoA is not
A CoA is lot paperwork for laboratory receiving and inventory. It is not a drug label, not a dosing guide, and not evidence of clinical suitability.
Frequently asked questions
- How does Costides test peptides?
- Published CoA lots document HPLC purity and mass spectrometry identity when those results are released. Verify lot numbers in the CoA library.
- Is every vial independently retested by Costides?
- Published lots include the CoA paperwork released for that lot. Wholesale and group-order programs may reference customer or group testing per published policy.