Glutathione lot KB9987 certificate of analysis
600 mg vial. Tested by Freedom Diagnostics: purity 99.37% by HPLC-UV, identity confirmed by LC-MS, net content 567.86 mg. Reported May 20, 2026.
Sample summary
| Product | Glutathione 600 mg |
|---|---|
| Lot | KB9987 |
| Purity (HPLC-UV) | 99.37% |
| Identity (LC-MS) | Confirmed |
| Net content | 567.86 mg (-5.4% vs. label) |
| Appearance | White lyophilized powder |
| Endotoxin | Not tested for this lot |
| Microbial analysis (PCR) | Not tested for this lot |
Laboratory record
| Testing laboratory | Freedom Diagnostics |
|---|---|
| Client on certificate | KLOW.Bio KLOW Labs LLC |
| Accession number | 2605190194 |
| Lab search code | KLOW2605190194 |
| Received by lab | May 19, 2026 |
| Reported | May 20, 2026 |
| Release specification | Purity ≥95%; identity confirmed |
| Against stated specification | Meets |
The client listed on the certificate, Klow Labs LLC (klow.bio), is the company that operates Glutathione Labs.
Analytical results and methods
| Test | Method | Result |
|---|---|---|
| Identity | liquid chromatography–mass spectrometry (LC-MS) | Confirmed |
| Purity | HPLC with UV detection (area percent) | 99.37% |
| Net content | Quantitation by the laboratory | 567.86 mg |
| Bacterial endotoxin | Limulus amebocyte lysate (USP <85>) | Not tested |
| Microbial DNA | Polymerase chain reaction (PCR) for common microbial contaminants | Not tested |
Verify this certificate
Accession number 2605190194, Lab search code KLOW2605190194.
- Find the lot number on your vial. It is printed on the label, for example KB9987.
- Look it up. Enter it at buyglutathionepeptide.com/verify, or open the matching lot in the COA archive.
- Check the lab's own record. Scan the Freedom Diagnostics QR code printed on the certificate, then search for klow.bio under the Company tab to view the laboratory record.
- Compare the details. Lot number, the laboratory’s reference numbers, purity and dates should match exactly.
What a certificate of analysis does and doesn't show
- A COA reports the identity, purity and content of the specific sample tested, on its test date. Results apply to that lot only.
- HPLC purity measures the main peak relative to other detected components. It does not identify the peak on its own; the separate identity test (LC-MS) does that.
- Mass confirmation matches molecular weight. It does not by itself confirm amino-acid order.
- Endotoxin and microbial results apply only where those tests appear on the certificate. Lots without them are marked "Not tested".
- A certificate does not establish stability after the test date or suitability for any particular purpose.
Other Glutathione lots
| Lot | Vial size | Net content | Purity (HPLC-UV) | Identity (LC-MS) | Endotoxin (LAL) | Microbial (PCR) | Reported | COA |
|---|---|---|---|---|---|---|---|---|
| KB9987 | 600 mg | 567.86 mg | 99.37% | Confirmed | Not tested | Not tested | View lot KB9987 | |
| KB9987 | 600 mg | 567.86 mg | 99.37% | Confirmed | Not tested | Not tested | View lot KB9987 |
Testing laboratory: Freedom Diagnostics. Release specification: purity ≥95% by HPLC-UV with identity confirmed by LC-MS. Results apply only to the lot listed. Certificates list the testing client as Klow.bio / Klow Labs LLC, the company that operates Glutathione Labs.
Glutathione lot KB9987 certificate of analysis
600 mg vial. Tested by Freedom Diagnostics: purity 99.37% by HPLC-UV, identity confirmed by LC-MS, net content 567.86 mg. Reported May 20, 2026.
Sample summary
| Product | Glutathione 600 mg |
|---|---|
| Lot | KB9987 |
| Purity (HPLC-UV) | 99.37% |
| Identity (LC-MS) | Confirmed |
| Net content | 567.86 mg (-5.4% vs. label) |
| Appearance | White lyophilized powder |
| Endotoxin | Not tested for this lot |
| Microbial analysis (PCR) | Not tested for this lot |
Laboratory record
| Testing laboratory | Freedom Diagnostics |
|---|---|
| Client on certificate | KLOW.Bio KLOW Labs LLC |
| Accession number | 2605190194 |
| Lab search code | KLOW2605190194 |
| Received by lab | May 19, 2026 |
| Reported | May 20, 2026 |
| Release specification | Purity ≥95%; identity confirmed |
| Against stated specification | Meets |
The client listed on the certificate, Klow Labs LLC (klow.bio), is the company that operates Glutathione Labs.
Analytical results and methods
| Test | Method | Result |
|---|---|---|
| Identity | liquid chromatography–mass spectrometry (LC-MS) | Confirmed |
| Purity | HPLC with UV detection (area percent) | 99.37% |
| Net content | Quantitation by the laboratory | 567.86 mg |
| Bacterial endotoxin | Limulus amebocyte lysate (USP <85>) | Not tested |
| Microbial DNA | Polymerase chain reaction (PCR) for common microbial contaminants | Not tested |
Verify this certificate
Accession number 2605190194, Lab search code KLOW2605190194.
- Find the lot number on your vial. It is printed on the label, for example KB9987.
- Look it up. Enter it at buyglutathionepeptide.com/verify, or open the matching lot in the COA archive.
- Check the lab's own record. Scan the Freedom Diagnostics QR code printed on the certificate, then search for klow.bio under the Company tab to view the laboratory record.
- Compare the details. Lot number, the laboratory’s reference numbers, purity and dates should match exactly.
What a certificate of analysis does and doesn't show
- A COA reports the identity, purity and content of the specific sample tested, on its test date. Results apply to that lot only.
- HPLC purity measures the main peak relative to other detected components. It does not identify the peak on its own; the separate identity test (LC-MS) does that.
- Mass confirmation matches molecular weight. It does not by itself confirm amino-acid order.
- Endotoxin and microbial results apply only where those tests appear on the certificate. Lots without them are marked "Not tested".
- A certificate does not establish stability after the test date or suitability for any particular purpose.
Other Glutathione lots
| Lot | Vial size | Net content | Purity (HPLC-UV) | Identity (LC-MS) | Endotoxin (LAL) | Microbial (PCR) | Reported | COA |
|---|---|---|---|---|---|---|---|---|
| KB9987 | 600 mg | 567.86 mg | 99.37% | Confirmed | Not tested | Not tested | View lot KB9987 | |
| KB9987 | 600 mg | 567.86 mg | 99.37% | Confirmed | Not tested | Not tested | View lot KB9987 |
Testing laboratory: Freedom Diagnostics. Release specification: purity ≥95% by HPLC-UV with identity confirmed by LC-MS. Results apply only to the lot listed. Certificates list the testing client as Klow.bio / Klow Labs LLC, the company that operates Glutathione Labs.
Buy Glutathione
600 mg vials. Current lot KB9987 tested at 99.37% purity with identity confirmed by LC-MS. Current purchasing is available through Klow.bio.