Third-party lab testing: 7 independent Janoshik assays on file, covering 6 substances, median measured purity 99.6%, most recent test 2025-11-18.
XL Peptides sells direct to researchers and at wholesale. The site says it has traded since 2024. It lists 28 products, including 5-Amino-1MQ, Tesamorelin, Ipamorelin, DSIP, BPC-157 + TB-500, and FOXO4-DRI, plus 11 other compounds.
In its own words: “Please note, it is bank holiday Monday in the UK, so any orders placed after 1pm Friday the 1st of May will not be processed and shipping till Tuesday the 5th of May.”
It advertises purity of 99%.
Prices run from £6.99 to £89.99 across 28 listed products. Payment is by cryptocurrency, bank transfer, credit card, and paypal. Orders ship with Royal Mail.
Site check: 28 products listed; payment by cryptocurrency, bank transfer, credit card, paypal; ships via Royal Mail.
XL Peptides is listed as active. UK supplier with 10,000+ clients worldwide, ≥99% purity, and temperature-controlled storage.
| Substance | Measured purity | Test date |
|---|---|---|
| Ghk-cu 50mg | 99.70% | 2025-11-18 |
| Pt-141 10mg | 99.94% | 2025-08-25 |
| Ghk-cu 50mg | 99.92% | 2025-01-29 |
| Tesamorelin 6mg | 99.28% | 2025-01-29 |
| Tb-500 5 Mg | 99.57% | 2025-01-29 |
| Igf1-lr3 1 Mg | 99.39% | 2025-01-29 |
| Nad+ | not reported | 2025-05-17 |
6 of these 7 assays report a measured purity figure. The other 1 confirm the substance was submitted and tested but carry no purity number on the certificate, which is not the same as a failed result.
| Status | Active |
|---|---|
| Independent assays on file | 7 |
| Median measured purity | 99.6% |
| Certificates of analysis | Vendor states COAs are available |
| Production country | United Kingdom |
| Vendor type | Research-use supplier |
This vendor advertises 99%. Across 7 independent Janoshik assays of its products, median measured purity is 99.6%, most recently 2025-11-18.
These details were read from XL Peptides's own website on 2026-08-10. Pages consulted:
XL Peptides is listed as active and we hold 7 independent Janoshik assays on file, median measured purity 99.6%. That is evidence about the batches that were tested or published, not a guarantee about the vial you receive.
Yes. We hold 7 third-party Janoshik assays for XL Peptides, covering 6 substances, with a median measured purity of 99.6%. The most recent is dated 2025-11-18.
XL Peptides accepts Cryptocurrency, Bank Transfer, Credit Card, PayPal.
XL Peptides uses Royal Mail.
Tested substances: Nad+.
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