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Vendors that closed.
Three of the top five US peptide vendors by traffic ceased operations between June 2025 and March 2026. We keep the audit pages live so readers searching for them land on accurate shutdown information, not on a scam site claiming the same name.
Closed vendors
- shutdownPrime Research Peptides
The gray-market storefront closed. By 12 October 2026 primeresearchpeptides.com/shop returned a 404 and the domain had been rebuilt as a research-peptide "evidence" site whose only call to action is a prescription telehealth service (Promise Peptides, mypromise.com). The sister domain truformcompounds.com (operator Truform Supplements LLC) sits behind a WordPress login, and primeresearchlabs.com serves only a WooCommerce demo template. No public peptide storefront remains on any of the three aliased domains.
read postmortem → - shutdownPure Rawz
Retail ceased. By 12 October 2026 purerawz.co had switched from a storefront to an "informational and affiliate website" that sends buyers to other shops (Swiss Chems, Ares Research, American Peptides) rather than selling directly; its /shop pages carry no cart and its affiliate page returns HTTP 410. The domain also carries an open FDA warning letter (MARCS-CMS 715218, 8 September 2025, CDER) naming five tianeptine products. The operating entity still runs the affiliate site, so this is a retail shutdown, not a confirmed business closure.
read postmortem → - shutdownPeptide Sciences
Quality collapse on retatrutide batches over 15 months culminated in counterfeit detection by Janoshik; federal pressure followed; operations ceased.
read postmortem → - shutdownAmino Asylum
FDA raid; SARMs products contained testosterone (controlled substance). Operations ceased; site offline; payments frozen.
read postmortem → - shutdownParadigm Peptides
Operations ceased in March 2024 during a federal investigation by the FDA Office of Criminal Investigations and the US Postal Inspection Service. Owner Matthew Kawa and employee Jennifer Stechkober pleaded guilty to introducing unapproved new drugs into interstate commerce with intent to defraud and mislead. Kawa additionally pleaded guilty to illegally importing merchandise. Both were sentenced on 30 July 2026.
read postmortem →