PT-141 Purity: 203 Lab Tests Across 81 Vendors

68 studies on PT-141 curated from PubMed, ClinicalTrials.gov, and EuropePMC. Updated daily.

We tested 203 PT-141 batches across 81 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 →

99.44%
Avg purity
203
Batches tested
81
Manufacturers
1
Failed <90% purity
18
Underdosed >10%
ManufacturerBatchesAvg purity
Verified Peptides 15 99.71% View COA →
Polaris Peptides 10 99.73% View COA →
Uther Peptide 9 99.82% View COA →
Hk Peptides 8 99.82% View COA →
Peptide Sciences 8 99.74% View COA →
Lilipeptide 8 99.31% View COA →
Qing Li Peptide 7 99.72% View COA →
Allen Biotechnology Co Abc 7 98.88% View COA →

Recent certificates: #15379 (99.759%) · #14675 (99.9%) · #13280 (99.9%) · #13281 (99.9%) · #12574 (99.9%) · #12204 (99.985%)

Vendors who tested PT-141

Manufacturers with published third-party certificates of analysis for PT-141. Open a vendor to see every batch we've verified.

Verified Peptides 15 COAs · 99.7% avg Polaris Peptides 10 COAs · 99.7% avg UTHER 9 COAs · 99.8% avg Hk Peptides 8 COAs · 99.8% avg Peptide Sciences 8 COAs · 99.7% avg Lilipeptide 8 COAs · 99.3% avg QLP 7 COAs · 99.7% avg ABC 7 COAs · 98.9% avg Peptide Gurus 6 COAs · 99.6% avg Reta Peptide 5 COAs · 99.8% avg QSC 5 COAs · 99.7% avg SSA 5 COAs · 99.6% avg

Research tools

Free, no account — handy when you're working with PT-141.

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