Finnrick, an independent testing programme, publishes 24 assays for Zen Peptides: 15 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 9 did not. Most recent assay 20 Jul 2026.
Zen Peptides operates from Singapore, listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/zen-peptides.
Zen Peptides sells to businesses rather than direct to researchers and operates from Hong Kong. It lists 9 products. It also produces and labels to order, so stock sold under other brand names may come from here.
In its own words: “ZEN-PEPTIDE belong to Hong Kong weili electric appliances limited is a manufacturer of peptides, have our own research lab, and production line.”
Zen Peptides publishes 10 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. Of the 9 product pages we opened, 2 state ≥99% purity.
No prices are published. You have to ask over messaging before you can compare cost against another supplier. Payment is by cryptocurrency, bank transfer, credit card, and paypal. Orders ship with DHL, FedEx, UPS, USPS, and EMS.
Worth knowing before you order: no research-use-only notice. We found no research-use-only or not-for-human-consumption disclaimer on the site.
Site check: 9 products listed; 10 certificates of analysis published; payment by cryptocurrency, bank transfer, credit card, paypal; ships via DHL, FedEx, UPS, USPS, EMS; operates from Hong Kong.
Zen Peptides is listed as active. Finnrick Grade D. Finnrick avg score: 6.2/10 across 19 samples (3 products). Below-average quality. Exercise caution.
Zen Peptides holds independent lab grade D, assigned across 19 graded samples, average score 6.2/10. 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 | 10 | 6 passed, 4 failed |
| Tesamorelin | 6 | 2 passed, 4 failed |
| GHK-Cu | 4 | 4 passed, 0 failed |
| Tirzepatide | 4 | 3 passed, 1 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 | D (19 samples) |
| Average grader score | 6.2/10 |
| Vendor type | Research-use supplier |
These details were read from Zen Peptides's own website on 2026-08-17. Pages consulted:
Zen Peptides is listed as active and we hold 24 Finnrick assays (15 passing, 9 failing its purity threshold); 10 certificates of analysis published on its own site; an independent lab grade of D. 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 24 assays for Zen Peptides: 15 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 9 did not. Most recent assay 20 Jul 2026.
Zen Peptides accepts Cryptocurrency, Bank Transfer, Credit Card, PayPal.
Zen Peptides ships from Hong Kong and uses DHL and FedEx and UPS and USPS and EMS.
Similar vendors: SwissChems, Bfflink, Reta-Peptide, HkRoids, Zenith Jove Peptide ZJ, Shanghai Baoju, Heman Peptide HM, Allen Biotechnology Co ABC.
Popular peptides: Semaglutide, Tirzepatide, Retatrutide, BPC-157, CJC-1295, Ipamorelin.
Other reviewed vendors: Zenergy Peptides Review, Zenith Jove Peptide ZJ Review, ZePeptide Review.