PT-141 Purity: 1140 Lab Tests Across 488 Identified Manufacturers

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

Bottom line: TitrateLab currently tracks 1,140 published third-party lab tests of PT-141 across 488 identified manufacturers. Among reports with a positive numeric purity result, the average is 99.71%. Within this published corpus, 2 positive purity results were below 90%, and 82 reports showed measured quantity more than 10% below the label claim. These are batch-level observations, not guarantees of product identity, safety, or vendor quality.

PT-141 average prices

As of 2026-09-03, vendor-blind retail asking-price averages for the US delivery market, calculated from the same in-stock exact-strength cells as the Peptide Price Index. Shipping is excluded.

Strength Average / vial Observed range / vial Average / mg Coverage
10 mg $8.60 $5.50–$10.50 $0.86 5 sources · 5 offers

Asking prices are not manufacturing cost and do not establish product equivalence, quality, safety, or legality. The refresh date is the catalog build date; individual source observation dates are not available in this snapshot. View full price methodology →

We tested 1140 PT-141 batches across 488 identified 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 →

Within that total, 247 batches have unresolved manufacturer identity. They remain in corpus-level lab evidence and are excluded from named-manufacturer rankings.

99.71%
Avg purity
1140
Batches tested
488
Identified manufacturers
2
Failed <90% purity
82
Underdosed >10%

Top 3 vendor evidence profiles for PT-141

Eligible vendors have at least 2 deduplicated tests and 2 classifiable identity observations. Rank uses the 95% lower confidence bound on clean identity results; mean positive purity and test count break ties. Missing measurements are not passes. Exact-zero/not-detected and explicit wrong-compound markers count once per adverse certificate. This describes tested batches, not every product or shipment, and is not an endorsement.

RankManufacturerTestsAvg positive purityIdentity adverse results
#1 23 99.82% 0 of 21 (0.0%) 0 0% / not detected · 0 wrong compound · 2 unclassified Reveal with Pro →
#2 20 99.87% 0 of 18 (0.0%) 0 0% / not detected · 0 wrong compound · 2 unclassified Reveal with Pro →
#3 14 99.71% 0 of 12 (0.0%) 0 0% / not detected · 0 wrong compound · 2 unclassified Reveal with Pro →

Manufacturer identities are included with Pro. Batch counts and lab measurements remain visible.

Recent certificates: #101334 (99.86%) · #101104 (99.92%) · #100916 (99.93%) · #101194 (99.88%) · #101210 (99.94%) · #99689 (99.37%)

PT-141 studies and clinical research

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