PE-22-28 Purity: 45 Lab Tests Across 32 Vendors

1 study on PE-22-28 curated from PubMed, ClinicalTrials.gov, and EuropePMC. Updated daily.

We tested 45 PE-22-28 batches across 32 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 →

99.64%
Avg purity
45
Batches tested
32
Manufacturers
2
Underdosed >10%
ManufacturerBatchesAvg purity
Simple Peptide 3 99.79% View COA →
Pure Peptide Labs LLC 3 99.79% View COA →
Peptide Technologies 2 99.93% View COA →
(unknown) 2 99.88% View COA →
Rejuvenate Peptides 2 99.86% View COA →
Peptaris 2 99.79% View COA →
Uther Peptide 2 99.78% View COA →
Unknown vendor (review) 2 99.75% View COA →

Recent certificates: #39754 (99.65%) · #51582 (99.76%) · #63208 (99.754%) · #31563 (97.22%) · #48801 (99.62%) · #48684 (99.72%)

Vendors who tested PE-22-28

Manufacturers with published third-party certificates of analysis for PE-22-28. Open a vendor to see every batch we've verified.

Pure Peptide Labs LLC 3 COAs · 99.8% avg Simple Peptide 3 COAs · 99.8% avg Peptide Technologies 2 COAs · 99.9% avg Rejuvenate Peptides 2 COAs · 99.9% avg Peptaris 2 COAs · 99.8% avg UTHER 2 COAs · 99.8% avg Alpha & Omega 2 COAs · 99.7% avg QSC 2 COAs · 99.7% avg Peptide Gurus 2 COAs · 99.4% avg XYX 1 COA · 99.9% avg Peptide Tech 1 COA · 99.9% avg cocerpeptides.com 1 COA · 99.9% avg

Research tools

Free, no account — handy when you're working with PE-22-28.

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