Retatrutide Purity: 4433 Lab Tests Across 474 Vendors

132 studies (12 from unattributed sources) on Retatrutide curated from PubMed, ClinicalTrials.gov, and EuropePMC. Updated daily.

We tested 4433 Retatrutide batches across 474 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 →

99.56%
Avg purity
4433
Batches tested
474
Manufacturers
14
Failed <90% purity
394
Underdosed >10%
ManufacturerBatchesAvg purity
Hk Peptides 137 99.77% View COA →
Lilipeptide 131 99.55% View COA →
Shanghai Sigma Audley Ssa 126 99.45% View COA →
Qing Li Peptide 116 99.62% View COA →
Nexaph 115 99.41% View COA →
Bfflist Amo 105 99.71% View COA →
Zlz Peptide 96 99.78% View COA →
Peptide Sciences 84 99.64% View COA →

Recent certificates: #16690 (99.524%) · #23591 (99.862%) · #16764 (99.522%) · #16766 (99.876%) · #21928 (99.9%) · #21929 (99.9%)

Vendors who tested Retatrutide

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

Hk Peptides 137 COAs · 99.8% avg Lilipeptide 131 COAs · 99.5% avg SSA 126 COAs · 99.5% avg QLP 116 COAs · 99.6% avg Nexaph 115 COAs · 99.4% avg AMO 105 COAs · 99.7% avg ZLZ 96 COAs · 99.8% avg Peptide Sciences 84 COAs · 99.6% avg Reta Peptide 80 COAs · 99.7% avg GYC 72 COAs · 99.7% avg Wuhan Wansheng Biotechnology 67 COAs · 99.5% avg Oupeptide 60 COAs · 99.6% avg

Research tools

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

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