How to Use This Site
Peptide Grades helps you find reliable peptide vendors. Here's how to get the most out of it.
Start with a peptide
Browse our peptides page or use the search bar on the homepage. Each peptide page shows a comparison table of vendors that carry it, sorted by Vendor Transparency Score.
Reading the comparison table
- Rating (A-E): The vendor's overall Vendor Transparency Score. A = excellent transparency, E = insufficient data.
- COAs: Whether the vendor publishes Certificates of Analysis. "Published" means they're on the site. "On Request" means you have to ask.
- Est.: When the vendor was established (WHOIS + incorporation records).
- Price: Current price per mg with 6-month price trend.
- Ships: Estimated shipping time and accepted payment methods.
- Stock: Current stock status.
Row badges
Some vendor rows have badges:
- Highest transparency score among vendors on this page.
- Best ValueBest price-to-transparency ratio.
Vendor profiles
Each vendor has a dedicated profile with a full score breakdown showing exactly why they received their rating. You can see which criteria they pass, which they fail, and make your own judgment.
A note on "best"
We intentionally avoid calling any vendor "the best." What's best depends on your priorities — transparency, price, shipping speed, payment options, or a combination. We give you the data; you make the call.