Lab testing
Every lot. Before release.
What we test, who tests it, how to check a report yourself, and what a certificate of analysis does not tell you.
Four tests on every lot.
A lot cannot be offered for sale on this site until all four results and the laboratory’s report are on its record.
Identity · LC-MS
Liquid chromatography–mass spectrometry confirms that the observed molecular mass matches the calculated mass for retatrutide. We publish both numbers.
Purity · HPLC
Reversed-phase HPLC with UV detection reports the main peak as a percentage of total peak area. Our release specification is 99.0% or higher.
Net content · quantitative HPLC
Quantitation against a reference standard gives the net peptide content per vial, which is what the 10 mg on the label refers to.
Endotoxin · LAL
A Limulus amebocyte lysate assay reports bacterial endotoxin per vial, as measured, with the laboratory's limit of detection.
The laboratory
Independent and named.
Testing is done by an outside laboratory. Each lot record names the laboratory that tested it, with its location and its accreditation as the laboratory states it.
Check a report
Go to the source.
Where a laboratory offers online verification, the lot record carries its link and key, so you can confirm that the report we publish is the report it issued. You can also send a vial to a third-party tester yourself and tell us what they find.
Look up a lotWhat a certificate does not show
A test describes one sample on one day.
- It does not show that every vial in a lot is identical, which is why net content is measured and reported for each lot.
- It does not show stability after the retest date, which is why each lot carries one and is withdrawn from sale when it passes.
- It says nothing about suitability for any purpose. The material is a laboratory reagent, and nothing on this site should be read otherwise.
Lot ledger.
Every lot we have received, newest first, including any that failed and were not sold.
| Lot | Manufactured | Tested | Laboratory | Purity | Observed / calc | Net content | Endotoxin | Status | Report | Verify key |
|---|
Corrections log.
When a published result for a released lot is changed, the change is recorded here automatically, and everyone who bought that lot is emailed.
No corrections recorded.