Peptide Sciences has shut down — and its name is being used by others

Quick checklist before deeper review

• Treat any storefront presenting itself as Peptide Sciences, or as its successor, as unauthorised — the company says so itself.
• Do not rely on a review, ranking, or comparison table dated before September 2026; almost all of them describe a company that was still trading.
• Check the trading status of any storefront before its documentation. A certificate of analysis proves nothing about a seller that will not be there next month.
• Where a familiar brand name reappears on a new domain, confirm the ownership rather than the styling — a matching logo is the cheapest thing to copy.
• Report impersonation to the address the company published for it rather than assuming somebody else already has.

Top-half signal table

What the company published

The notice occupies the whole of the peptidesciences.com homepage, in place of the catalogue that used to sit there. It says that after careful consideration the company decided to voluntarily shut down operations and discontinue the sale of its research products, thanks its customers, and then does something most quiet closures do not: it addresses what happens to the name.

The company states that it retains all rights, title and interest in its name, brand, trademarks and intellectual property, and that it will continue to protect and enforce those rights. It then says plainly that any website, platform, entity or individual claiming affiliation with Peptide Sciences, representing itself as a successor, or claiming to sell its products, is unauthorised and fraudulent and has no affiliation with the company. It asks that such activity be reported to the address it publishes alongside the notice.

We read this directly at the source on 2 September 2026 rather than taking it from a secondary report. Medibact has no affiliation with Peptide Sciences and no commercial relationship with it or with any storefront named on this site.

Why the warning matters more than the closure

Companies close. What makes this one worth a page is the gap it leaves. Our own keyword measurement on 31 August 2026 put the brand name at roughly 110,000 US searches a month — the largest single branded term in this market, and larger than the next-best-known name by a wide margin. That demand does not stop when a company does. It keeps arriving, at search results built for a storefront that is no longer there.

The people arriving on those searches are, by definition, the most decided buyers in the market: they have stopped comparing and started typing a name. They are the readers least likely to scrutinise whatever they land on, and the company's own notice says that some of what they will land on is claiming a relationship that does not exist.

This is also why almost every review of Peptide Sciences you can currently find is wrong, including the one that used to be on this page. Store reviews are written once and left, and a review written while a company was trading reads as a live recommendation forever. Ours carried an editorial trust score of 71 out of 100 in six languages until the day this page was rewritten. We record that here rather than quietly correcting it, because the failure is the interesting part: nothing in our process asked whether the subject of a review was still in business.

What to do with a familiar name on an unfamiliar site

• Establish that the seller is trading, and who they are, before you look at anything else. Documentation quality is a question for a shortlist, not for a first contact.
• Treat a matching name, logo or page layout as evidence of nothing. Those are the cheapest parts of a storefront to reproduce, and a closed brand with live demand is precisely the case where reproducing them pays.
• Prefer a seller who is currently answerable to one who merely looks established. A responsive contact channel and a checkable business identity outrank an archive of well-formatted certificates.
• Check the date on any review, ranking or comparison table before you use it, and discard the ones that predate the closure. This applies to ours as much as anyone's.
• If you encounter a site trading on this name, the company asks for reports at the address published with its notice.

What we changed on this page, and what we changed behind it

This review previously described Peptide Sciences as an operating storefront and told readers what to verify before ordering from it. That text was generated from a shared store template, as was its trust score, which was derived from a shared constant rather than from anything specific to the company. Neither had any way of knowing whether the business existed.

Every reviewed store and laboratory on this site now carries a recorded trading status with the date it was established and a statement of what was actually seen. Where an entity is not confirmed to be operating, the generated trust score and the generated "appears to operate" description are withheld rather than printed, and the page says what we could not confirm. The build refuses to publish a review that has no trading status attached to it, so a future addition cannot repeat this.

Two other entries changed in the same pass. Amino Asylum's cited domain no longer hosts a storefront — it serves a coupons landing page promoting a different seller — and Phoenix Peptide and Janoshik Analytical both sit behind bot-verification walls we did not attempt to bypass. All three are now marked unverified and none of them carries a generated score. That is a weaker statement than this page makes about Peptide Sciences, and deliberately so: being unable to look is not the same as finding a closure.

Limits of this page

• This records a closure the company itself announced. It is not a judgement on the products it sold, the quality of its documentation, or the conduct of the business while it traded.
• We do not know, and do not claim to know, whether any particular storefront now using this name is one of those the company's notice refers to. The notice is the company's statement; identifying individual sites is not something we have done.
• Everything here is research-context information about a market. Nothing on this page is guidance about the use of any compound in humans or animals.
• Medibact is not affiliated with Peptide Sciences. The name is used here only to identify the company being described.

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