Third-party lab testing: 8 independent Janoshik assays on file, covering 6 substances, median measured purity 99.4%, most recent test 2025-09-24.
Finnrick, an independent testing programme, publishes 12 assays for Rayshine Peptide Biochemicals: 9 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 3 did not. Most recent assay 4 Aug 2026.
Rayshine Peptide Biochemicals operates from china, listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/rayshine-peptide-biochemicals.
Rayshine Peptide Biochemicals supplies research peptides and operates from Hong Kong. The site says it has traded since 2019.
In its own words: “Founded in 2019, Rayshine-Peptide Biochemistry Co., Ltd. is a factory engaged in the development and production of peptides, with 1 development and design laboratory and 3500 square meters of production space, 11 production lines, which can fully meet the domestic and international supply of products.”
Rayshine Peptide Biochemicals publishes 5 certificates of analysis on its site. The vendor chose which batches to publish, so those results do not tell you what is in the vial you receive.
Payment is by credit card.
Site check: 5 certificates of analysis published; payment by credit card; operates from Hong Kong.
Rayshine Peptide Biochemicals is listed as active. Finnrick Grade C. Finnrick avg score: 7.7/10 across 7 samples (1 products). Mixed quality — some products test well, others below average.
Rayshine Peptide Biochemicals holds independent lab grade C, assigned across 7 graded samples, average score 7.7/10. That grade comes from an independent grader's own sampling, not from PeptideAtlas, and it describes the samples that grader obtained rather than every batch sold.
| Substance | Measured purity | Test date |
|---|---|---|
| Tesamorelin 5mg | 99.38% | 2025-09-22 |
| Tesamorelin 5mg | 99.38% | 2025-09-22 |
| Epithalon 10mg | 99.76% | 2025-09-18 |
| Epithalon 10mg | 99.76% | 2025-09-18 |
| Semaglutide 10mg | 99.29% | 2025-06-09 |
| Retatrutide 20mg | 99.52% | 2025-06-05 |
| Slp-pp-332 5mg | not reported | 2025-09-24 |
| Nad+500mg | not reported | 2025-09-17 |
6 of these 8 assays report a measured purity figure. The other 2 confirm the substance was submitted and tested but carry no purity number on the certificate, which is not the same as a failed result.
| Product | Assays | Result |
|---|---|---|
| Retatrutide | 8 | 5 passed, 3 failed |
| Tirzepatide | 4 | 4 passed, 0 failed |
Source: Finnrick, as published 2026-08-09. Pass and fail are Finnrick's classification against its own threshold, not ours.
| Status | Active |
|---|---|
| Independent lab grade | C (7 samples) |
| Average grader score | 7.7/10 |
| Independent assays on file | 8 |
| Median measured purity | 99.4% |
| Vendor type | Research-use supplier |
These details were read from Rayshine Peptide Biochemicals's own website on 2026-08-17. Pages consulted:
Rayshine Peptide Biochemicals is listed as active and we hold 8 independent Janoshik assays on file, median measured purity 99.4%; 12 Finnrick assays (9 passing, 3 failing its purity threshold); 5 certificates of analysis published on its own site; an independent lab grade of C. That is evidence about the batches that were tested or published, not a guarantee about the vial you receive.
Yes. We hold 8 third-party Janoshik assays for Rayshine Peptide Biochemicals, covering 6 substances, with a median measured purity of 99.4%. The most recent is dated 2025-09-24. Finnrick, an independent testing programme, publishes 12 assays for Rayshine Peptide Biochemicals: 9 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 3 did not. Most recent…
Rayshine Peptide Biochemicals accepts Credit Card.
Rayshine Peptide Biochemicals ships from Hong Kong.
Tested substances: Tesamorelin 5mg, Epithalon 10mg, Semaglutide 10mg, Retatrutide 20mg.
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