Lab records by peptide
TB-500 vendors
Vendors that sell TB-500, ranked by what independent labs found in their vials: 289 tests across 60 shops since May 2025. 6 shops graded A or B for TB-500; 45 shops graded D or E.
- 38%of TB-500 tests passed; median purity 99.30%
- 27%of vials held more than 5% less TB-500 than the label
- Most common failurepurity under 99.5% (139 tests). In 33 vials the lab could not confirm it was TB-500 at all.
- Last 90 days63 tests from 40 shops, 36 failed. Newest result Oct 9, 2026.
TB-500 vendors ranked by lab record
The grade is for TB-500 only, not the shop's whole catalog. A shop can pass on one peptide and fail on another. Shops with the same grade are ordered by number of tests.
| Vendor | Grade | Tests | Passed | Median purity | Under-filled | Last test |
|---|---|---|---|---|---|---|
| Tech-Wave Peptides | A | 3 | 2/2 | 99.80% | 2/2 | Sep 24, 2026 |
| Yabang Peptide | A | 3 | 3/3 | 99.80% | 1/3 | Sep 16, 2026 |
| Mokemei Zhengzhou Biotechnology MKM | A | 2 | 2/2 | 99.90% | 1/2 | Oct 1, 2026 |
| NuLife Peptides | A | 2 | 2/2 | 99.90% | 1/2 | May 6, 2026 |
| Warrior Makers | A | 2 | 2/2 | 99.90% | 0/2 | Oct 9, 2026 |
| Yiwu Aozuo Trading CoLast failure Oct 21, 2025: purity under 99.5% | B | 6 | 5/6 | 99.90% | 2/6 | Aug 3, 2026 |
| YimeiNo working storefront foundLast failure Mar 4, 2026: purity under 99.5% | D | 7 | 4/6 | 99.66% | 2/6 | Aug 21, 2026 |
| Peptide CraftersLast failure Sep 15, 2026: purity under 99.5% | D | 6 | 4/6 | 99.50% | 2/6 | Sep 15, 2026 |
| HXNetNo working storefront foundLast failure Feb 18, 2026: purity under 99.5% | D | 5 | 3/5 | 99.70% | 1/5 | Jun 6, 2026 |
| Ningbo Shuyou PlasticizationLast failure Apr 28, 2026: purity under 99.5% | D | 3 | 2/3 | 99.50% | 1/3 | Aug 5, 2026 |
| Xingruida XDRWebsite homepage returns 500Last failure May 27, 2026: purity under 99.5% | D | 3 | 2/3 | 99.60% | 0/3 | Aug 9, 2026 |
| Qing Li PeptideLast failure Sep 15, 2026: the lab could not confirm it was the labelled peptide | E | 19 | 3/19 | 97.14% | 3/14 | Sep 15, 2026 |
| LiliPeptideLast failure Sep 15, 2026: purity under 99.5%; amount in the vial more than 35% off the label | E | 15 | 2/15 | 97.22% | 3/15 | Sep 15, 2026 |
| Peptide PartnersPayment problems reportedLast failure Jul 20, 2026: purity under 99.5% | E | 13 | 4/13 | 99.20% | 2/13 | Aug 5, 2026 |
| Reta-PeptideLast failure Sep 3, 2026: the lab could not confirm it was the labelled peptide | E | 13 | 5/13 | 98.50% | 1/11 | Sep 3, 2026 |
| Wuhan Wansheng BiotechnologyLast failure Sep 18, 2026: the lab could not confirm it was the labelled peptide | E | 11 | 5/11 | 98.79% | 3/8 | Oct 8, 2026 |
| HK PeptidesLast failure Sep 10, 2026: purity under 99.5% | E | 10 | 5/10 | 99.77% | 0/8 | Sep 10, 2026 |
| SRY LabsLast failure Sep 15, 2026: the lab could not confirm it was the labelled peptide | E | 9 | 3/9 | 99.06% | 4/8 | Sep 15, 2026 |
| Tianjin Ruiwang New Material Technology CoWebsite domain does not resolveLast failure Aug 13, 2026: purity under 99.5% | E | 8 | 1/8 | 99.40% | 2/6 | Aug 13, 2026 |
| Welon Peptide SolutionsLast failure Jul 13, 2026: the lab could not confirm it was the labelled peptide | E | 7 | 2/7 | 99.45% | 2/6 | Aug 9, 2026 |
| ZePeptideLast failure Aug 13, 2026: the lab could not confirm it was the labelled peptide | E | 7 | 4/7 | 99.90% | 1/4 | Aug 13, 2026 |
| Dankang BioHealthLast failure Jul 1, 2026: the lab could not confirm it was the labelled peptide | E | 6 | 2/6 | 98.95% | 2/4 | Sep 15, 2026 |
| LumiraLast failure Oct 6, 2026: the lab could not confirm it was the labelled peptide | E | 6 | 3/6 | 99.50% | 2/4 | Oct 6, 2026 |
| NexaphLast failure Feb 2, 2026: purity under 99.5% | E | 6 | 2/5 | 99.50% | 1/4 | Apr 30, 2026 |
| Shanghai ERP peptide BiotechnologyLast failure Jul 22, 2026: the lab could not confirm it was the labelled peptide | E | 6 | 3/6 | 99.60% | 1/5 | Aug 28, 2026 |
| ZLZ PeptideLast failure May 13, 2026: purity under 99.5% | E | 6 | 2/6 | 98.28% | 1/6 | Jul 15, 2026 |
| OupeptideLast failure Jul 20, 2026: the lab could not confirm it was the labelled peptide | E | 5 | 1/5 | 94.00% | 1/4 | Jul 20, 2026 |
| Allen Biotechnology Co ABCLast failure Jul 17, 2026: the lab could not confirm it was the labelled peptide | E | 4 | 1/4 | 97.80% | 0/3 | Jul 17, 2026 |
| CellupepLast failure Mar 19, 2026: purity under 99.5% | E | 4 | 2/4 | 99.45% | 0/4 | Mar 19, 2026 |
| LipeptidesLast failure Mar 18, 2026: purity under 99.5% | E | 4 | 1/4 | 98.28% | 2/4 | May 15, 2026 |
30 more shops with TB-500 tests
- Lisa Biopeptide · 4 tests · grade E
- Shanghai Baoju · 4 tests · grade E
- Shanxi Qianyecao Biotech QYC · 4 tests · grade E
- Uther · 4 tests · grade E
- Xian Yihang Technology · 4 tests · grade E
- Zenith Jove Peptide ZJ · 4 tests · grade E
- Cocer Peptides · 3 tests · grade E
- FSD · 3 tests · grade E
- Guangzhou Lengiuanhuang Cosmetics · 3 tests · grade E
- Hebei Rimao Technology · 3 tests · grade E
- Henan Sahe Peptide · 3 tests · grade E
- Mai Peptide · 3 tests · grade E
- PurePEPS · 3 tests · grade E
- Shanghai Sigma Audley SSA · 3 tests · grade E
- Shanghai Wibson Biotechnology WBS · 3 tests · grade E
- Shenzhen Loga Tech LG LOGA · 3 tests · grade E
- Skye Peptides · 3 tests · grade E
- Tianjin Eleli Technology Development · 3 tests · grade E
- Bulk Peptide Supply · 2 tests · grade E
- Kerui Peptide HongKong · 2 tests · grade E
- Pura Peptides · 2 tests · grade E
- TSC Top Supplements China · 5 tests
- Huaian Hanyou Peptide · 4 tests
- Amino Usa · 3 tests
- Zhuoyue Biotechnology · 3 tests
- Bionexis Peptides · 2 tests
- Orbitrex Peptides · 2 tests
- Apollo Peptide Sciences · 1 test
- Heman Peptide HM · 1 test
- Hydro Research · 1 test
Recent failed TB-500 tests
The newest results that failed, with the reason and the lab's certificate. Check whether your batch number matches before you trust a shop's own paperwork.
- LumiraOct 6, 2026 · Ichor Life Sciencesthe lab could not confirm it was the labelled peptide · Certificate
- Kerui Peptide HongKongOct 1, 2026 · Harrens Labthe lab could not confirm it was the labelled peptide · Certificate
- Tianjin Eleli Technology DevelopmentSep 24, 2026 · Krause Analyticalthe lab could not confirm it was the labelled peptide · Certificate
- Orbitrex PeptidesSep 24, 2026 · Krause Analyticalpurity under 99.5% · purity 98.10% · fill -6.0% · Certificate
- Mai PeptideSep 18, 2026 · PharmLabsthe lab could not confirm it was the labelled peptide · Certificate
- Wuhan Wansheng BiotechnologySep 18, 2026 · PharmLabsthe lab could not confirm it was the labelled peptide · Certificate
TB-500 vendors that closed or went offline
Each status is quoted from its source. A shop with no working website may still sell through messaging apps, which is a reason for more caution, not less.
- YimeiNo working storefront found (Finnrick) · last TB-500 test Aug 21, 2026
- HXNetNo working storefront found (Finnrick) · last TB-500 test Jun 6, 2026
- Xingruida XDRWebsite homepage returns 500 (Our site check) · last TB-500 test Aug 9, 2026
- Peptide PartnersPayment problems reported (Finnrick) · last TB-500 test Aug 5, 2026
- Tianjin Ruiwang New Material Technology CoWebsite domain does not resolve (Our site check) · last TB-500 test Aug 13, 2026
- FSDNo working storefront found (Finnrick) · last TB-500 test Aug 6, 2026
- Hebei Rimao TechnologyWebsite domain does not resolve (Our site check) · last TB-500 test May 6, 2026
- Shenzhen Loga Tech LG LOGAWebsite domain does not resolve (Our site check) · last TB-500 test Jul 17, 2026
The full list is on closed peptide vendors.
Before you order TB-500
- Look at the shop's grade for TB-500, not its average. Qing Li Peptide has the most TB-500 tests (19); a shop with one or two tests has not shown it is consistent.
- 94% of these vials were bought and sent in by customers; the rest were sent by Finnrick or by the shop itself. Results from vials a shop chose to send are the weakest evidence.
- 8 labs tested them, mostly Krause Analytical and BTLabs. Ask for the certificate for your batch and check it on the lab's own site.
- Run the vendor checklist before paying, and read how the grades work.
Research peptides are sold for laboratory use only. This page reports lab results; it is not medical advice.