Red Rock Peptides scores 43/100 in pepmg's criteria-based Vendor Score, which rates only what a vendor publishes about lab testing and about itself, not its products and not its prices. What we observed: COA documents, no lab named. The biggest credibility signal pepmg weighs is how a vendor publishes lab tests: pepmg catalogued COA documents on its site, but none of them open at a testing lab's own site and none name a lab pepmg could resolve, so a buyer can read the documents without being able to confirm them at the source. Neither price nor catalog size affects this score, but for context it prices about 1.6x the tracked median across the compounds it shares with other tracked vendors, over 33 tracked listings. Its prices are machine-readable and it publishes an About page, and the domain is newer, online since Nov 2025, which pepmg counts as neutral rather than a mark against it. This rates what Red Rock Peptides publishes about lab testing and about itself, not the purity or authenticity of any vial, which pepmg can't verify, so read the COAs yourself. Research use only.

• Room to improve Publishes COA documents — no testing lab attributed — 10 COA documents found, 0 of them openable at the testing lab's own site

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