Finnrick, an independent testing programme, publishes 130 assays for Peptide-S: 89 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 37 did not. Most recent assay 3 Aug 2026.
Peptide-S listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/peptide-s.
Peptide-S sells direct to researchers and at wholesale. It lists 186 products, including Ipamorelin, BPC-157 + TB-500, Vilon, Thymosin Alpha-1, Thymalin, and Testagen, plus 41 other compounds.
In its own words: “Looks like you haven’t added anything yet. Start exploring our products and find what you need.”
Of the 12 product pages we opened, every one links its own certificate.
Prices run from $27.99 to $219.99 across 186 listed products. Orders ship with UPS and USPS.
Site check: 186 products listed; ships via UPS, USPS.
Peptide-S is listed as active. Finnrick Grade C. Finnrick avg score: 7.2/10 across 128 samples (11 products). Mixed quality — some products test well, others below average.
Peptide-S holds independent lab grade C, assigned across 128 graded samples, average score 7.2/10. 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.
| Product | Assays | Result |
|---|---|---|
| Retatrutide | 43 | 28 passed, 14 failed |
| Tirzepatide | 40 | 33 passed, 6 failed |
| GHK-Cu | 9 | 8 passed, 0 failed |
| Tesamorelin | 8 | 2 passed, 6 failed |
| Semaglutide | 6 | 4 passed, 1 failed |
| BPC-157 | 5 | 3 passed, 2 failed |
| Cagrilintide | 4 | 1 passed, 3 failed |
| Ipamorelin | 4 | 3 passed, 1 failed |
| Mazdutide | 4 | 3 passed, 1 failed |
| Survodutide | 4 | 4 passed, 0 failed |
| Sermorelin | 3 | 0 passed, 3 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 (128 samples) |
| Average grader score | 7.2/10 |
| Vendor type | Research-use supplier |
| Satisfaction | 0.4/5 |
|---|---|
| Delivery | 4.8/5 |
| Customer service | 5/5 |
| Packaging | 4.7/5 |
| Ease of purchase | 4.8/5 |
| Payment | 4.8/5 |
Scored out of 5 by the same independent grader, from its own buyers rather than from this site.
These details were read from Peptide-S's own website on 2026-08-10. Pages consulted:
186 of 186 listed products were in stock when we last read the catalogue.
Peptide-S is listed as active and we hold 130 Finnrick assays (89 passing, 37 failing its purity threshold); 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. Finnrick, an independent testing programme, publishes 130 assays for Peptide-S: 89 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 37 did not. Most recent assay 3 Aug 2026.
Peptide-S uses UPS and USPS.
Similar vendors: Peptide Sciences, Limitless Life Nootropics, Polaris Peptides, NextechLabs, Yiwu Aozuo Trading Co, Shandong Shengyuan Peptide Technology, Bulk Peptide Supply, Skye Peptides.
Popular peptides: Semaglutide, Tirzepatide, Retatrutide, BPC-157, CJC-1295, Ipamorelin.
Compare this vendor: Amino Tech vs Peptide-S, Healthletic vs Peptide-S, LA Peptides vs Peptide-S, Licensed Peptides vs Peptide-S, Modern Aminos vs Peptide-S.
Other reviewed vendors: Peptide Sciences Review, Peptide Shop Review, Peptide Shop Canada Review.