Third-party lab testing: 25 independent Janoshik assays on file, covering 20 substances, median measured purity 99.8%, most recent test 2026-02-24.
Modern Peptides sells direct to researchers and at wholesale. The site says it has traded since 2022. It lists 75 products, including GLP-1, FOXO4-DRI, Vilon, Vesugen, Thymogen, and Cortagen, plus 36 other compounds.
In its own words: “A Southern California research-products company focused on transparent sourcing, secure checkout, and real support.”
Modern Peptides publishes 1 certificate of analysis on its site, all credited to Janoshik Analytical. The vendor chose which batches to publish, so those results do not tell you what is in the vial you receive. Of the 12 product pages we opened, 8 state 99.738% purity and every one links its own certificate.
Prices run from $5.00 to $290.00 across 75 listed products. Payment is by cryptocurrency, bank transfer, and credit card. Orders ship with FedEx, UPS, USPS, and Canada Post.
Site check: 75 products listed; 1 certificates of analysis published; payment by cryptocurrency, bank transfer, credit card; ships via FedEx, UPS, USPS, Canada Post.
Modern Peptides is listed as active. Tracked by Finnrick with 1 unlisted tests.
| Substance | Measured purity | Test date |
|---|---|---|
| Retatrutide 50mg | 99.92% | 2026-02-24 |
| Retatrutide 20mg | 99.87% | 2026-02-24 |
| Tirzepatide 30mg | 99.85% | 2026-01-26 |
| Retatrutide 10mg | 99.81% | 2026-01-26 |
| Tirzepatide 15mg | 99.73% | 2026-01-16 |
| Retatrutide 20mg | 99.49% | 2026-01-16 |
| Cartalax 20mg | 99.71% | 2026-01-16 |
| Bpc-157 20mg | 99.50% | 2026-01-16 |
| Tesamorelin 20mg | 99.82% | 2026-01-09 |
| Retatrutide 10mg | 99.68% | 2026-01-07 |
| KLOW 80 | not reported | 2026-02-23 |
| GLOW 70 (bpc-157, Tb500, Ghk-cu) | not reported | 2025-12-15 |
10 of these 12 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.
All 25 lab tests for Modern Peptides
| Status | Active |
|---|---|
| Independent assays on file | 25 |
| Median measured purity | 99.8% |
| Vendor type | Research-use supplier |
This vendor advertises 99.738%. Across 25 independent Janoshik assays of its products, median measured purity is 99.8%, most recently 2026-02-24.
These details were read from Modern Peptides's own website on 2026-08-10. Pages consulted:
Modern Peptides is listed as active and we hold 25 independent Janoshik assays on file, median measured purity 99.8%; 1 certificates of analysis published on its own site. That is evidence about the batches that were tested or published, not a guarantee about the vial you receive.
Yes. We hold 25 third-party Janoshik assays for Modern Peptides, covering 20 substances, with a median measured purity of 99.8%. The most recent is dated 2026-02-24.
Modern Peptides accepts Cryptocurrency, Bank Transfer, Credit Card.
Modern Peptides uses FedEx and UPS and USPS and Canada Post.
Tested substances: Retatrutide 50mg, Retatrutide 20mg, KLOW 80, Tirzepatide 30mg, Retatrutide 10mg, Tirzepatide 15mg, Cartalax 20mg, Bpc-157 20mg, Tesamorelin 20mg, Semaglutide 10mg, Tirzepatide 60mg, Slu-pp-332.
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Popular peptides: Semaglutide, Tirzepatide, Retatrutide, BPC-157, CJC-1295, Ipamorelin.
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