10 independent third-party assays of Nad+ 500mg, covering 10 vendors.
Assay dates span 2024-09-23 to 2026-03-18.
Manufacturer recorded on the certificate: Peptira LLC.
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 |
|---|---|---|---|
| Henan Sahe Peptide | 1 | not reported | 2026-03-18 |
| ZLZ Peptide | 1 | not reported | 2025-11-20 |
| liuquanqun | 1 | not reported | 2025-11-03 |
| Rayshine Peptide Biochemicals | 1 | not reported | 2025-09-17 |
| Hangzhou Mandy Biotechnology | 1 | not reported | 2025-08-28 |
| Peptira | 1 | not reported | 2025-08-13 |
| Amino Alchemy | 1 | not reported | 2025-08-11 |
| Zztai Peptide | 1 | not reported | 2025-07-02 |
| HK Peptides | 1 | not reported | 2024-09-26 |
| Peptide Gurus | 1 | not reported | 2024-09-23 |
Vendors assayed: Henan Sahe Peptide, ZLZ Peptide, liuquanqun, Rayshine Peptide Biochemicals, Hangzhou Mandy Biotechnology, Peptira, Amino Alchemy, Zztai Peptide, HK Peptides, Peptide Gurus.