TB-500 Purity: 537 Lab Tests Across 183 Vendors

17 studies (22 from unattributed sources) on TB-500 curated from PubMed, ClinicalTrials.gov, and EuropePMC. Updated daily.

We tested 537 TB-500 batches across 183 manufacturers

Independent certificate-of-analysis evidence from third-party labs — the data behind the studies. Updated as new COAs are verified. Read the full grey-market analysis →

98.1%
Avg purity
537
Batches tested
183
Manufacturers
15
Failed <90% purity
27
Underdosed >10%
ManufacturerBatchesAvg purity
Qing Li Peptide 19 95.67% View COA →
Verified Peptides 18 99.64% View COA →
Sry Labs 17 98.87% View COA →
Uther Peptide 16 99.6% View COA →
Reta Peptide 14 97.26% View COA →
Lilipeptide 13 96.84% View COA →
Nexaph 12 99.39% View COA →
Peptide Partners 11 99.22% View COA →

Recent certificates: #22131 (96.1%) · #22162 (97.5%) · #22135 (99.4%) · #22161 (97.5%) · #22152 (99.9%) · #14810 (99.749%)

Vendors who tested TB-500

Manufacturers with published third-party certificates of analysis for TB-500. Open a vendor to see every batch we've verified.

QLP 19 COAs · 95.7% avg Verified Peptides 18 COAs · 99.6% avg SRY 17 COAs · 98.9% avg UTHER 16 COAs · 99.6% avg Reta Peptide 14 COAs · 97.3% avg Lilipeptide 13 COAs · 96.8% avg Nexaph 12 COAs · 99.4% avg Peptide Partners 11 COAs · 99.2% avg Hk Peptides 11 COAs · 98.9% avg GYC 10 COAs · 99.4% avg Modern Research LLC 8 COAs · 99.6% avg QSC 8 COAs · 99.2% avg

Research tools

Free, no account — handy when you're working with TB-500.

Reconstitution calculator Bac water, concentration & insulin-unit math Verify a COA Look up a report number against our corpus