7 independent third-party assays of GLOW 70mg, covering 6 vendors.
Assay dates span 2025-04-29 to 2026-03-09.
Manufacturer recorded on the certificates: Penguin Peptides, XTP.
A certificate of analysis describes the lot that was submitted and nothing else. It is not a guarantee about a later batch, and purity is not identity — a sample can assay clean and still be the wrong compound, or the right compound at the wrong concentration. Vendors with no assay row below have not been tested here, which is not the same as having failed.
| Vendor | Assays | Median measured purity | Most recent |
|---|---|---|---|
| Penguin Peptides | 2 | not reported | 2026-01-21 |
| Panda Peptides LLC | 1 | not reported | 2026-03-09 |
| Zztai Peptide | 1 | not reported | 2025-10-16 |
| Homopeptide | 1 | not reported | 2025-09-29 |
| Qing Li Peptide | 1 | not reported | 2025-06-26 |
| XTP | 1 | not reported | 2025-04-29 |
Vendors assayed: Penguin Peptides, Panda Peptides LLC, Zztai Peptide, Homopeptide, Qing Li Peptide, XTP.