Semaglutide Purity: 941 Lab Tests Across 307 Vendors

941 studies (2 from unattributed sources) on Semaglutide curated from PubMed, ClinicalTrials.gov, and EuropePMC. Updated daily.

We tested 941 Semaglutide batches across 307 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 →

99.54%
Avg purity
941
Batches tested
307
Manufacturers
3
Failed <90% purity
55
Underdosed >10%
ManufacturerBatchesAvg purity
Polaris Peptides 26 99.51% View COA →
Qingdao Sigma Chemical 23 99.51% View COA →
Peptide Sciences 21 99.71% View COA →
Nexaph 18 98.41% View COA →
Simple Peptide 16 99.86% View COA →
Peptide Crafters 16 99.8% View COA →
(unknown) 16 99.57% View COA →
Aminos Research 15 99.73% View COA →

Recent certificates: #63635 (99.885%) · #62991 (99.9%) · #42777 (99.91%) · #22090 (99.8%) · #22091 (99.7%) · #14540 (99.9%)

Vendors who tested Semaglutide

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

Polaris Peptides 26 COAs · 99.5% avg QSC 23 COAs · 99.5% avg Peptide Sciences 21 COAs · 99.7% avg Nexaph 18 COAs · 98.4% avg Simple Peptide 16 COAs · 99.9% avg Peptide Crafters 16 COAs · 99.8% avg Aminos Research 15 COAs · 99.7% avg Nuscience Peptides 14 COAs · 99.0% avg Felix Chemical Supply 12 COAs · 99.9% avg Planet Peptide 12 COAs · 99.8% avg Hk Peptides 12 COAs · 99.7% avg AMO 12 COAs · 99.6% avg

Research tools

Free, no account — handy when you're working with Semaglutide.

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