How We Review Peptide Companies: Our Scoring Methodology
By James Tod · Updated · Editorial policyContains affiliate links. We may earn a commission on purchases. More
Every company on this site is scored on the same seven criteria, with the same weights. This page explains each criterion, where the facts come from and how we keep them current.
The criteria
| Criterion | Weight | What scores well |
|---|---|---|
| Independent testing | 25% | A certificate of analysis (COA) for each lot, from a named third-party lab such as Janoshik, Finnrick or Freedom Diagnostics, with the lot number and test date. |
| Price per mg | 20% | Listed price per milligram across five commonly stocked research compounds, compared at the same vial size where possible. |
| US shipping and speed | 15% | Ships from inside the United States, states a processing time, and offers tracked shipping with a clear free-shipping threshold. |
| Transparency | 15% | One consistent business address and legal entity, a working contact channel, and published terms, shipping and refund policies. |
| Refund and reship policy | 10% | A written policy for damaged, lost or incorrect orders, including reships, with clear time limits. |
| Catalogue and stock | 10% | Range of research compounds and blends offered, and whether listed products are actually in stock. |
| Customer reviews | 5% | Rating and number of reviews on independent platforms such as Trustpilot, read together with community discussion. |
Each criterion is scored from 0 to 10. The total score is the weighted sum, out of 100. A company is only ranked when all seven criteria have been checked.
Where the data comes from
- The company's own product, shipping, refund, contact and lab-testing pages.
- Published certificates of analysis and, where available, the testing lab's own verification.
- Independent review platforms such as Trustpilot, read together with community discussion.
Every fact is stored with the page it came from and the date we checked it.
How often we update
Prices and stock are rechecked at least monthly, and policies and testing whenever a company changes them. The date next to each company shows its last full check.
What we do not cover
Products discussed here are sold for research and laboratory use only. We do not give dosing, administration, protocol or health information, and we do not review effects in people.
Conflicts of interest
This site contains affiliate links, and we may earn a commission when you buy through them. The same criteria and weights apply to every company, and where a company scores lower on a criterion that score is shown. Details are on the About page.