Retatrutide Purity: 4345 Lab Tests Across 474 Vendors

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

We tested 4345 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 →

99.55%
Avg purity
4345
Batches tested
474
Manufacturers
14
Failed <90% purity
307
Underdosed >10%
ManufacturerBatchesAvg purity
Hk Peptides 135 99.77% View COA →
Lilipeptide 126 99.55% View COA →
Shanghai Sigma Audley Ssa 125 99.45% View COA →
Qing Li Peptide 116 99.62% View COA →
Nexaph 114 99.41% View COA →
Bfflist Amo 105 99.71% View COA →
Zlz Peptide 95 99.78% View COA →
Reta Peptide 79 99.7% 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 135 COAs · 99.8% avg Lilipeptide 126 COAs · 99.5% avg SSA 125 COAs · 99.5% avg QLP 116 COAs · 99.6% avg Nexaph 114 COAs · 99.4% avg AMO 105 COAs · 99.7% avg ZLZ 95 COAs · 99.8% avg Reta Peptide 79 COAs · 99.7% avg GYC 72 COAs · 99.7% avg Peptide Sciences 69 COAs · 99.6% avg Wuhan Wansheng Biotechnology 67 COAs · 99.5% avg Oupeptide 59 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