TB-500 lab test results by vendor
How each vendor's TB-500 held up in independent third-party lab tests: purity, dose against the label, and how often vials failed.
What Is TB-500? Benefits, Evidence & RisksWhat it does, what the research shows, and the known risks.For research use only. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings. How scores work
- Vials tested
- 29
- Lab reports
- 26
- Vendors
- 10
- Vials failed
- 0.0%
- Median purity
- 99.56%
- Median dose vs label
- +10.7%
Results from Aug 2024 to Feb 2026. A vial fails if it's empty, under 95% pure, more than 20% under its label, or more than 50% over (0 of 29 vials).
Key facts
- VendorVerify holds lab results for 29 TB-500 vials from 10 vendors, from 26 independent lab reports dated Aug 2024 to Feb 2026.
- 0.0% of TB-500 vials on file failed (0 of 29), meaning empty, under 95% pure, more than 20% under label or more than 50% over.
- The median TB-500 vial on file tested at 99.56% purity.
- The median TB-500 vial on file held +10.7% compared with the amount on its label.
- 1 vendor has 5 or more TB-500 lab reports and is ranked for TB-500.
TB-500 vendors
| Vendor | Verdict | Score | Failed vials | Lab reports | Median dose vs label | Avg. purity | Vendor page |
|---|---|---|---|---|---|---|---|
| Uther | At market | 85.5 | 0.0% | 6 | +17.2% | 99.39% | View vendor Uther |
| Not enough data to rank (fewer than 5 lab reports) | |||||||
| SRY | Not ranked | 89.2 | 0.0% | 4 | +2.9% | 99.45% | View vendor SRY |
| SSA | Not ranked | 87.9 | 0.0% | 3 | +9.8% | 99.54% | View vendor SSA |
| FSD | Not ranked | 87.7 | 0.0% | 2 | +8.7% | 99.45% | View vendor FSD |
| TCI | Not ranked | 87.6 | 0.0% | 4 | +8.8% | 99.65% | View vendor TCI |
| QSC | Not ranked | 86.9 | 0.0% | 1 | +8.0% | 98.99% | View vendor QSC |
| SNP | Not ranked | 86.9 | 0.0% | 2 | +14.9% | 99.71% | View vendor SNP |
| SPB | Not ranked | 86.8 | 0.0% | 2 | +16.2% | 99.70% | View vendor SPB |
| ASC | Not ranked | 86.4 | 0.0% | 1 | +19.3% | 99.52% | View vendor ASC |
| MPS | Not ranked | 86.4 | 0.0% | 1 | +19.4% | 99.97% | View vendor MPS |
Every TB-500 vial against its label
One dot per vial, placed by how much it held compared with the amount on the label.
Dot chart of 29 vials (every TB-500 vial on file), each placed by its measured amount compared with the label, from 50% under to 50% over. 3 are within 5% of the label, 26 are 5 to 20% under or more than 5% over, 0 are more than 20% under or more than 50% over, and 0 were empty.
TB-500: common questions
Which TB-500 vendors pass lab testing?
Among vendors with at least 5 lab reports for TB-500, the highest scores currently go to Uther (score 85.5, 0.0% of vials failed). 1 vendor is ranked for TB-500 in all, and the table on this page lists every vendor's results. Rankings change as new reports arrive.
How often do TB-500 vials fail testing?
0 of 29 TB-500 vials on file failed (0.0%). A vial fails if it's empty, under 95% pure, more than 20% under its label, or more than 50% over it.
Are TB-500 vials underdosed?
Usually not; if anything they run over. The typical TB-500 vial on file held +10.7% compared with the amount on its label. Individual vials vary much more than that, and the chart on this page shows every one.
What purity do TB-500 vials test at?
The median TB-500 vial tested at 99.56% purity. We count anything under 95% as a failed vial and give full marks for purity at 99.5% or higher, because small differences above that are within normal lab-to-lab variation.
Where do these TB-500 results come from?
From 26 independent lab reports, mostly commissioned by buyers, covering 29 vials from 10 vendors, dated Aug 2024 to Feb 2026. VendorVerify doesn't test anything itself. A report a vendor paid for is only used if the lab can verify it, and it is marked as vendor-commissioned and counts at half weight.
Does VendorVerify sell TB-500?
No. VendorVerify doesn't sell peptides of any kind. VendorVerify sells nothing and takes no money from vendors. No affiliate links, no coupon codes, no paid rankings.