On the afternoon of March 6, 2026, at about 2:00 PM Eastern, the store at peptidesciences.com disappeared and a short notice took its place. Several independent write-ups reported the voluntary shutdown within days. When we fetched the homepage on October 19, 2026, it returned HTTP 403, so the site did not load during our check, and the Trustpilot page for the domain returns HTTP 451, the code for content unavailable for legal reasons. Peptide Sciences is closed. This report exists because older guides, affiliate pages and forum threads still recommend it, and readers who follow those links deserve a plain statement of what the record shows.
What the record shows about the closure
Because the vendor site no longer loads, nothing on it can be verified. Testing methods, laboratory names, certificates, prices, shipping terms, the return policy and contact details are all unverified fields in our record. What survives of the pre-closure picture comes almost entirely from a single secondary article by ThePeptideList, which operates a competing directory, and we weight it accordingly. That article describes a Henderson, Nevada company with a catalog of roughly 100 products including GLP-class items, accepting Venmo, Zelle, Cash App, cryptocurrency and card, and claiming a certificate for every batch.
No refund policy and no transition plan were reported at the time of the shutdown. A buyer who held an open order in March 2026 had, as far as the public record shows, no published path to a refund. That silence is the most consequential fact about the closure, and it is the reason we would be cautious about any brand presenting itself as a continuation of this one.
What we could not verify
ThePeptideList also reports that the about page claimed a founding date of 1990 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 two listings. We searched fda.gov for that letter within this research and could not find it, so we do not treat it as established. These are precisely the claims a fact-checker would normally test against the company’s own pages, and the pages are gone.
Finnrick, an independent testing aggregator, is reported to have placed one of the company’s GLP-class products in its lowest rating band across 34 samples, with a latest test date of August 4, 2025, citing quantities up to 50 percent off label and one misidentified sample. That summary reaches us through ThePeptideList rather than from Finnrick directly, and we attribute it as such rather than stating it as our own finding.
Our read
Treat any current recommendation of Peptide Sciences as stale. The company has not operated since March 2026, announced no refund path, and left behind a thin record that rests on one interested source. Readers who arrive here from an old link, a coupon page or a forum post should look elsewhere, and should be wary of any site that claims to be a successor to the brand or to hold its remaining stock.
