Verification
Certificate of analysis library
Every batch we release is tested by an independent ISO/IEC 17025 laboratory. Search by batch number, lot or product to pull the exact certificate that shipped with your vial.
26
Certificates
99.07%
Average purity
13
Products covered
3
Independent labs
| Product | Batch | Lot | Tested | Laboratory | Purity | Identity | |
|---|---|---|---|---|---|---|---|
| Glutathione (reduced) · 500 mg | PQX26071175 | L26189-025 | Jul 08, 2026 | Freedom Diagnostics | 99.51% | Confirmed | Open → |
| Glutathione (reduced) · 500 mg | PQX26061182 | L26177-026 | Jun 26, 2026 | Janoshik Analytical | 99.61% | Confirmed | Open → |
How to read a COA.
Purity is measured by HPLC-UV against the total peak area; identity is confirmed by LC-MS against the expected monoisotopic mass; net content verifies the fill weight in the vial. If a batch does not meet spec, it is not released.
