Lab records by peptide
Melanotan II vendors
Vendors that sell Melanotan II, ranked by what independent labs found in their vials: 182 tests across 45 shops since February 2025. 17 shops graded A or B for Melanotan II; 13 shops graded D or E.
- 62%of Melanotan II tests passed; median purity 99.67%
- 34%of vials held more than 5% less Melanotan II than the label
- Most common failurepurity under 99.5% (60 tests). In 5 vials the lab could not confirm it was Melanotan II at all.
- Last 90 days12 tests from 8 shops, 1 failed. Newest result Sep 14, 2026.
Melanotan II vendors ranked by lab record
The grade is for Melanotan II 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 |
|---|---|---|---|---|---|---|
| Atomik Labz | A | 4 | 4/4 | 99.95% | 0/4 | May 21, 2025 |
| Deuschem | A | 4 | 4/4 | 99.83% | 4/4 | Aug 4, 2025 |
| Eternal Peptides | A | 4 | 4/4 | 99.87% | 0/4 | May 21, 2025 |
| Injectify | A | 4 | 4/4 | 99.90% | 0/4 | May 8, 2026 |
| Planet Peptide | A | 4 | 4/4 | 99.69% | 0/4 | Feb 19, 2025 |
| Suaway Lab Research | A | 4 | 4/4 | 99.72% | 2/4 | May 16, 2025 |
| Bulk Peptide Supply | A | 3 | 3/3 | 99.89% | 1/3 | Oct 3, 2025 |
| SaiyanMed | A | 3 | 3/3 | 99.90% | 1/3 | Aug 3, 2026 |
| Amino Asylum | A | 2 | 2/2 | 99.56% | 1/2 | Feb 19, 2025 |
| Bulk Peptide Wholesale | A | 2 | 2/2 | 99.89% | 0/2 | Feb 6, 2026 |
| Uther | A | 2 | 2/2 | 99.56% | 0/2 | Oct 9, 2025 |
| Zenith Jove Peptide ZJ | A | 2 | 2/2 | 99.90% | 0/2 | Jul 23, 2026 |
| ZLZ Peptide | A | 2 | 2/2 | 99.93% | 1/2 | Feb 26, 2026 |
| Zztai Peptide | A | 2 | 2/2 | 99.73% | 0/2 | Jan 6, 2026 |
| Amino AmigosLast failure Mar 20, 2025: purity under 99.5% | B | 5 | 4/5 | 99.83% | 5/5 | Mar 20, 2025 |
| Elite Research USALast failure Jun 26, 2025: purity under 99.5% | B | 5 | 4/5 | 99.85% | 0/5 | Aug 4, 2025 |
| Oasis PeptidesLast failure Feb 19, 2025: purity under 99.5% | B | 5 | 4/5 | 99.80% | 0/5 | Mar 25, 2026 |
| HK PeptidesLast failure Feb 26, 2026: purity under 99.5% | C | 12 | 8/11 | 99.80% | 1/11 | Jul 9, 2026 |
| Qing Li PeptideLast failure Jan 26, 2026: amount in the vial more than 35% off the label | C | 7 | 5/7 | 99.80% | 1/6 | Mar 13, 2026 |
| Zhejiang Yichenkang BiotechnologyLast failure Jun 26, 2025: purity under 99.5%; amount in the vial more than 35% off the label | C | 5 | 3/4 | 99.79% | 3/4 | Aug 4, 2025 |
| Precision Peptide CoLast failure May 8, 2025: purity under 99.5% | C | 4 | 3/4 | 99.64% | 1/4 | May 16, 2025 |
| Pure RawzLast failure May 8, 2025: purity under 99.5% | C | 4 | 3/4 | 99.61% | 3/4 | May 21, 2025 |
| Shanghai ERP peptide BiotechnologyLast failure Apr 30, 2026: the lab could not confirm it was the labelled peptide | C | 4 | 3/4 | 99.80% | 0/3 | May 25, 2026 |
| TydesLast failure Mar 20, 2025: purity under 99.5% | C | 4 | 3/4 | 99.51% | 0/4 | Mar 20, 2025 |
| Wuhan Wansheng BiotechnologyLast failure Mar 6, 2026: purity under 99.5% | D | 6 | 4/6 | 99.77% | 2/6 | Jul 1, 2026 |
| Reta-PeptideLast failure Oct 23, 2025: purity under 99.5% | D | 5 | 3/5 | 99.56% | 0/5 | Jun 15, 2026 |
| Loti LabsLast failure Mar 16, 2025: purity under 99.5% | D | 3 | 2/3 | 99.71% | 3/3 | Mar 16, 2025 |
| PeptiLab ResearchLast failure May 8, 2025: purity under 99.5% | D | 3 | 2/3 | 99.61% | 0/3 | May 8, 2025 |
| Peptide SciencesLast failure Feb 19, 2025: purity under 99.5%; amount in the vial more than 35% off the label | E | 10 | 5/10 | 99.44% | 10/10 | Feb 19, 2025 |
| Nuscience PeptidesLast failure May 21, 2025: purity under 99.5% | E | 7 | 1/7 | 99.07% | 1/7 | May 8, 2026 |
15 more shops with Melanotan II tests
- Platinum Cryo · 6 tests · grade E
- LiliPeptide · 5 tests · grade E
- Shanghai Sigma Audley SSA · 5 tests · grade E
- Peptide Crafters · 4 tests · grade E
- Verified Peptides · 4 tests · grade E
- Science · 2 tests · grade E
- Xingruida XDR · 2 tests · grade E
- Peptides For Sale · 6 tests
- Skye Peptides · 4 tests
- Peptide Gurus · 3 tests
- Simple Peptide · 3 tests
- Accelerate Labs · 2 tests
- Pharma Grade Peptides · 2 tests
- VoriLabs · 2 tests
- BioPrecise LLC · 1 test
Recent failed Melanotan II 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.
- Shanghai Sigma Audley SSASep 14, 2026 · Krause Analyticalthe lab could not confirm it was the labelled peptide · Certificate
- Peptides For SaleMay 13, 2026 · Krause Analyticalpurity under 99.5%; amount in the vial more than 35% off the label · purity 97.60% · fill -60.0% · Certificate
- Shanghai ERP peptide BiotechnologyApr 30, 2026 · BTLabsthe lab could not confirm it was the labelled peptide · Certificate
- Wuhan Wansheng BiotechnologyMar 6, 2026 · Krause Analyticalpurity under 99.5% · purity 98.90% · fill +6.0% · Certificate
- LiliPeptideMar 6, 2026 · Krause Analyticalthe lab could not confirm it was the labelled peptide · Certificate
- Shanghai Sigma Audley SSAMar 6, 2026 · Krause Analyticalpurity under 99.5% · purity 98.50% · fill -7.0% · Certificate
Melanotan II 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.
- Xingruida XDRWebsite homepage returns 500 (Our site check) · last Melanotan II test Jul 31, 2025
The full list is on closed peptide vendors.
Before you order Melanotan II
- Look at the shop's grade for Melanotan II, not its average. HK Peptides has the most Melanotan II tests (12); a shop with one or two tests has not shown it is consistent.
- 30% 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.
- 6 labs tested them, mostly Krause Analytical and Chromate. 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.