How We Review Peptide Vendors
By Russel Martin · Updated · Editorial policyContains affiliate links. We may earn a commission on purchases. More
Every review on this site answers the same questions from the vendor's own pages, and every fact is stored with the page it came from and the date we checked it.
What we check
| Area | Weight in scores | 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. |
Scores out of 10 per area, weighted to a total out of 100, will be added once every vendor has been checked against all seven areas. Until then the reviews show the facts without a score.
Where the facts come from
- The vendor's product, shipping, refund, contact, terms and lab-testing pages.
- Certificates of analysis as published, including lot numbers, lab names and test dates where shown.
- The vendor's Trustpilot profile, where one exists.
We do not log in, create accounts or place orders to see gated content. Where a page is behind a login or blocks our check, the review says so under "What we could not verify".
How often we recheck
Each review shows the date of its last check. Prices and stock change often; policies and testing pages are rechecked whenever a vendor changes them and at least monthly.
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.
Affiliate links
This site contains affiliate links, and we may earn a commission when you buy through them. Every vendor is reviewed with the same checks, and its watch-outs are shown in full. Details are on the About page.