L-glutathione COA — Verified Certificate of Analysis Results
6 independent third-party certificates of analysis for L-glutathione, from 3 labs across 5 vendors (2024-12-18 to 2026-04-23).
Every L-glutathione certificate of analysis below is from an independent third-party lab, ingested and verified by TitrateLab. The figures here are computed live from the 6 published L-glutathione certs in our corpus.
6
Certificates
3
Independent labs
99.9%
Median tested purity
100%
Within 10% of label dose
↑ 50%
Overdosed (≥ +7% vs label)
↓ 0%
Underdosed (≤ −7% vs label)
Verified L-glutathione certificates of analysis
| Vendor | Purity | Dose vs label | Lab | Tested | |
|---|---|---|---|---|---|
| Amino Lair | 98.531% | -2.7% | Unknown | 2026-04-23 | View COA → |
| Iron Peptides | 99.885% | -2.3% | Freedom Diagnostics | 2025-12-03 | View COA → |
| Liberty Peptides | 99.962% | +9.8% | Freedom Diagnostics | 2025-10-04 | View COA → |
| Liberty Peptides | 99.34% | +8.3% | Freedom Diagnostics | 2025-08-15 | View COA → |
| P4R Wholesale, LLC | 99.18% | — | Freedom Diagnostics | 2025-03-06 | View COA → |
| Peptide Crafters | 99.95% | — | Janoshik | 2024-12-18 | View COA → |