Special Report
We Independently Tested 20 Peptide Samples. Here’s What We Found.
Six months, three laboratories, and 20 anonymously purchased samples from 12 companies. Purity ranged from 61% to 99.2% — and two products failed verification entirely.
Investigations
Original data-driven reporting: multi-sample laboratory projects, market analyses, and accountability journalism built on our own testing.
The GLP-1 gray market after compounding: where the supply went
As legal compounding contracted, demand moved to research-chemical channels. We tracked availability, pricing, and quality across 40 listings.
InvestigationPT-141 underdosing: a pattern across three companies
Every PT-141 product we have tested since 2025 measured under label. The shortfalls cluster suspiciously.
InvestigationCold-chain shipping study: temperature logging across 12 suppliers
We shipped temperature loggers with orders from every indexed company. Summer transit told a clear story.
Lab InsightsThe Peptide Institute Weekly
Research. Testing. Regulation. No hype.
One email a week: new study summaries, the latest independent lab results, ranking movements, and regulatory developments that matter.
- New research, summarized in plain English
- Independent lab results as they publish
- Score and ranking movements