What happened to Peptide Sciences
Peptide Sciences, of Henderson, Nevada, was for years one of the most widely recommended names in this market. It is no longer operating. Several independent write-ups report that peptidesciences.com replaced its store with a short voluntary-shutdown notice at about 2:00 PM Eastern on March 6, 2026. When we fetched the homepage on October 19, 2026 it returned HTTP 403, and the company’s Trustpilot page returns HTTP 451, unavailable for legal reasons. No refund policy and no transition plan were reported at the time of closure.
Because the site did not load, nothing about the company’s former testing program can be verified today. Third-party status, laboratory names, public certificates, per-lot coverage, methods, endotoxin and sterility are all unknown, and so are pricing and shipping. The record notes a catalog of around 100 products before closure, including BPC-157, TB-500 and a GLP-class product, and payment methods of Venmo, Zelle, Cash App, crypto and card, but every one of those details comes from a single secondary article by ThePeptideList, which operates a competing directory, and none could be checked against the vendor’s own pages.
What the public record adds
The same secondary source reports that the about page claimed a 1990 founding while the domain was registered in December 2009, that the registered address was a virtual mailbox at a coworking center, and that a 2023 FDA warning letter concerned health claims on BPC-157 and TB-500 pages. We could not verify that letter against fda.gov within this research, so we treat it as an unconfirmed report rather than a fact.
ThePeptideList also relays that Finnrick, an independent testing aggregator, rated one of the vendor’s GLP-class products poorly across 34 samples, with the latest test on August 4, 2025, citing quantities up to 50 percent off label and one misidentified sample. That is a second-hand account of Finnrick’s data, and we present it as such rather than as our own finding.
What readers should do with old recommendations
Recommendations for Peptide Sciences still circulate on comparison pages, in forum threads and in older guides. Any page presenting it as a current supplier is out of date. Because the company announced no transition plan, any storefront claiming to be a successor or an authorized reseller should be evaluated from scratch on its own disclosures, and the former Henderson address is not a route to support for anyone with an open order.
Our position is simple. Closed as of March 6, 2026, with no verifiable certificates, prices or policies remaining, Peptide Sciences should come off every shortlist, and the name should be treated with care wherever it reappears.
What we liked
What we would want fixed
- The company voluntarily shut down on March 6, 2026, and the homepage returned HTTP 403 when we fetched it on October 19, 2026.
- No refund policy and no transition plan were reported at the time of the shutdown.
- The Trustpilot page returns HTTP 451, unavailable for legal reasons, so no review history can be read.
- Every pre-closure detail in the record comes from a single secondary article by a competing directory and could not be verified on the vendor's own site.
The data behind this review
Verification checklist
- Third-party laboratory testingNot verified
- Certificates of analysis open to the publicNot verified
- Certificates tied to a specific lotNot verified
- Testing laboratory namedFail
- Research-use-only disclaimer presentNot verified
- No FDA warning letter on recordPass
- Identifiable company (address or phone)Fail
- Currently operatingFail
Full fact sheet
| Website | peptidesciences.com |
|---|---|
| Status | Closed |
| Based in | Henderson, NV |
| Founded | Not stated |
| Third-party testing | Not verified |
| Laboratories named | None named |
| Certificates public | Not verified |
| Lot-specific certificates | Not verified |
| Methods shown | Not verified |
| Catalog size | ≈100 listings |
| Formats | Not stated |
| Price tier | Not assessed |
| Free shipping from | Not stated |
| Ships from / abroad | unknown / Not verified |
| Payment methods | venmo, zelle, cashapp, crypto, card |
| Certifications claimed | None claimed |
| Research-use disclaimer | Not verified |
| Contact | No public contact details found |
Frequently asked questions
Is Peptide Sciences still open?
No. Several independent write-ups report that peptidesciences.com replaced its store with a voluntary-shutdown notice at about 2:00 PM Eastern on March 6, 2026. The homepage returned HTTP 403 during our check on October 19, 2026, and no live storefront exists.
Where was Peptide Sciences located?
The record lists Henderson, Nevada. ThePeptideList, a secondary source that runs a competing directory, described the registered address as a virtual mailbox at a coworking center. We could not verify that on the vendor site.
Did Peptide Sciences publish COAs?
We cannot say. The site did not load during our check, so testing, laboratory names and certificate availability are all unknown. A per-batch certificate claim appears only in a secondary article.
Sources: www.peptidesciences.com · thepeptidelist.substack.com/p/peptide-sciences-is-dead- · projectbiohacking.beehiiv.com/p/peptide-sciences-just-clo · peptidesexplorer.com/blog/peptide-sciences-shut- · www.trustpilot.com/review/peptidesciences.com. Spotted an error? Request a correction.