Research
Retatrutide phase 3 data shows sustained metabolic improvements at 68 weeks
Interim results from the TRIUMPH program suggest the triple agonist maintains its lead over dual-incretin therapy on weight and liver-fat endpoints.
Independent Nonprofit Research Testing Reporting
Tracking the science.
Testing the industry.
The Peptide Institute is an independent nonprofit watchdog, research organization and news publication covering peptides, GLP-1s and emerging human-performance science.
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Independent Testing
View All TestingWe test the industry ourselves.
The Peptide Institute independently purchases peptide and GLP-1 products from leading companies across the industry and commissions third-party laboratory testing to evaluate what consumers are actually receiving. Our findings feed directly into The Peptide Index™ and our ongoing evaluation of product quality, purity, transparency, reliability, customer experience and fulfillment.
Tested
Semaglutide
Apex Peptides
- Purity
- 99.1%
Tested
View Lab Report
Tested
BPC-157
Research Peptides Co.
- Purity
- 98.7%
Tested
View Lab Report
Tested
CJC-1295
PureSci Labs
- Purity
- 97.8%
Tested
View Lab ReportThe Peptide Index™
View Full RankingsIndependent peptide company rankings.
Our proprietary Index Score™ evaluates companies using independent testing and a structured set of quality, transparency, reliability, fulfillment and customer-experience factors.
| Rank | Company | Index Score™ | Trend |
|---|---|---|---|
| 1 — rank 1 | Apex Peptides #1 Overall | 92 Index Score 92 out of 100 | no change |
| 2 — rank 2 | Research Peptides Co. Top Quality | 89 Index Score 89 out of 100 | no change |
| 3 — rank 3 | PureSci Labs Most Transparent | 87 Index Score 87 out of 100 | no change |
| 4 | 85 Index Score 85 out of 100 | 2 moved up | |
| 5 | 83 Index Score 83 out of 100 | 1 moved down |
Rankings updated weekly Last updated
Explore Peptides & GLP-1s
Browse research, testing, news and community discussions by compound.
From The Community
Real discussions from people following peptides and research.
- Does anyone else get headaches when taking reta? Retatrutide 87 replies 14m ago
- My shipment arrived with a broken vial, but they replaced it immediately. Company Discussion 24 replies 1h ago
- What has everyone’s experience been with BPC-157? BPC-157 112 replies 2h ago
- Shipping was surprisingly fast — only two days. Company Discussion 31 replies 3h ago
Research & Education
Understand the evidence, not the marketing.
Evergreen, evidence-based explainers written for people who want to evaluate claims themselves — how to read a certificate of analysis, what evidence levels mean, and what the published research does and does not support.
Peptide stability: how storage and handling impact purity
Lyophilized peptides are more fragile than the marketing suggests. What degradation looks like in our testing data.
Lab Insights
How to read a certificate of analysis — and how to spot a fake one
A COA is only as good as the laboratory behind it. A practical walkthrough of chromatograms, mass-spec traces, and red flags.
Education
Why we publish failed tests — and what happens after we do
Disputes, retests, legal letters, and score consequences: the afterlife of a failed verification.
TransparencyWhy We Exist
An independent nonprofit watchdog for a rapidly evolving industry.
The Peptide Institute is a 501(c)(3) nonprofit organization dedicated to bringing transparency, accountability and reliable information to the peptide, GLP-1 and human-performance space.
Learn About The Institute-
Watchdog
Independent testing, company monitoring and consumer reports to hold the industry to a higher standard.
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Research
We analyze scientific literature, clinical data and emerging compounds to separate signal from hype.
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Publication
Timely news, investigative reporting and education to keep the public informed and empowered.