Third-party lab testing: 18 independent Janoshik assays on file, covering 17 substances, median measured purity 99.5%, most recent test 2025-12-19.
Finnrick, an independent testing programme, publishes 35 assays for Zztai Peptide: 28 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 7 did not. Most recent assay 25 Mar 2026.
Zztai Peptide operates from Hong Kong, Shenzhen, Guangdong, listed by Finnrick as "Trading". Source: Finnrick, https://www.finnrick.com/vendors/zztai-peptide.
Zztai Peptide sells direct to researchers and operates from Hong Kong. It lists 62 products, including Mazdutide, Survodutide, Cagrilintide, Retatrutide, Semaglutide, and Tirzepatide, plus 34 other compounds. It also produces and labels to order, so stock sold under other brand names may come from here.
In its own words: “Henan ZHITAI Technology Co., Ltd. adheres to the brand concept of "innovation leads, technology applies, peptides open the future" and is committed to becoming a leader in the field of biotechnology.”
We found no test results or certificates anywhere on Zztai Peptide's site. Of the 12 product pages we opened, 11 state 99% purity.
Prices run from $15.00 to $640.00 across 62 listed products. Payment is by credit card and paypal. Orders ship with DHL, FedEx, UPS, and USPS. Quoted delivery is 3-6 Business days to United States, 3-6 business days to Canada, 5-10 business days to United Kingdom.
Worth knowing before you order: consumer email only, no published COAs, and no research-use-only notice. Every contact address is a free consumer mailbox ([email protected], [email protected]) rather than an address on the company's own domain. There is no registered business identity behind the contact route.
Site check: 62 products listed; payment by credit card, paypal; ships via DHL, FedEx, UPS, USPS; operates from Hong Kong.
Zztai Peptide is listed as active. Finnrick Grade C. Finnrick avg score: 6.7/10 across 31 samples (2 products). Mixed quality — some products test well, others below average.
Zztai Peptide holds independent lab grade C, assigned across 31 graded samples, average score 6.7/10. 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.
Community standing: 4.2/5 on Trustpilot from 20 reviews. Ratings of anonymous sellers of unregulated products are the weakest signal on this page; the assay and grading records carry more.
| Substance | Measured purity | Test date |
|---|---|---|
| DSIP 5mg | 99.01% | 2025-12-19 |
| Tirzepatide 60mg | 99.95% | 2025-12-18 |
| Retatrutide 20mg | 99.54% | 2025-12-18 |
| HGH 191AA (somatropin) 151U | 97.83% | 2025-12-18 |
| Mots-c 10mg | 99.10% | 2025-10-21 |
| Retatrutide 30mg | 99.62% | 2025-10-21 |
| Retatrutide 20mg | 99.56% | 2025-10-21 |
| Retatrutide 5mg | 99.24% | 2025-10-21 |
| Retatrutide 15mg | 99.41% | 2025-10-21 |
| Retatrutide 50mg | 99.69% | 2025-10-21 |
| HGH 191AA(Somatropin 10IU | 97.50% | 2025-10-20 |
| GLOW 70mg | not reported | 2025-10-16 |
11 of these 12 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.
All 18 lab tests for Zztai Peptide
| Product | Assays | Result |
|---|---|---|
| Tirzepatide | 20 | 14 passed, 6 failed |
| Retatrutide | 11 | 10 passed, 1 failed |
| GHK-Cu | 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 (31 samples) |
| Average grader score | 6.7/10 |
| Trustpilot | 4.2/5 from 20 reviews |
| Independent assays on file | 18 |
| Median measured purity | 99.5% |
| Vendor type | Research-use supplier |
| Satisfaction | 0.4/5 |
|---|---|
| Delivery | 4.9/5 |
| Customer service | 4.3/5 |
| Packaging | 4.8/5 |
| Ease of purchase | 4.5/5 |
| Payment | 3.5/5 |
Scored out of 5 by the same independent grader, from its own buyers rather than from this site.
This vendor advertises 99%. Across 18 independent Janoshik assays of its products, median measured purity is 99.5%, most recently 2025-12-19.
These details were read from Zztai Peptide's own website on 2026-08-10. Pages consulted:
Zztai Peptide is listed as active and we hold 18 independent Janoshik assays on file, median measured purity 99.5%; 35 Finnrick assays (28 passing, 7 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. We hold 18 third-party Janoshik assays for Zztai Peptide, covering 17 substances, with a median measured purity of 99.5%. The most recent is dated 2025-12-19. Finnrick, an independent testing programme, publishes 35 assays for Zztai Peptide: 28 met its Purity focus threshold (at least 99.5% purity, no more than 35% dosage deviation) and 7 did not. Most recent assay 25 Mar 2026.
Zztai Peptide accepts Credit Card, PayPal.
Zztai Peptide ships from Hong Kong and uses DHL and FedEx and UPS and USPS.
Tested substances: DSIP 5mg, Tirzepatide 60mg, Retatrutide 20mg, Mots-c 10mg, Retatrutide 30mg, Retatrutide 5mg, Retatrutide 15mg, Retatrutide 50mg, GLOW 70mg, Semax 10mg, Tirzepatide 30mg, Retatrutide 10mg.
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