Science.bio Closed (January 2026): Closure Date, Official Notice, Current Status and Sources

Yes, Science.bio is permanently closed: its closure notice went up between January 28 and February 4, 2026, and on September 27, 2026 science.bio still showed only that notice. Internet Archive captures show the store open with no notice on January 28, 2026 and a permanent-closure banner on February 4, 2026. Its site notice gives no reason and names no successor; a Science.bio customer email dated January 27, 2026, quoted in an archived forum post, said it was closing that day for regulatory compliance reasons. Pepta Labs is not affiliated with Science.bio; it matches two Science.bio item names by compound name to its own listings, Semax 10 mg from $27.74 and Selank 10 mg from $33.24.

Is Science.bio closed, and when did it close?

Science.bio is permanently closed. The science.bio domain still loads, but since at least April 20, 2026 it has shown only a closure notice, with no catalog, product pages, cart or checkout, and that was still the case on September 27, 2026. The store's own pages call it both Science.bio and Science Bio.

Science.bio's site notice is undated, so the date the notice went up is known from the Internet Archive record to a one-week window. The closure announcement itself is dated: a forum post of January 27, 2026 on rapamycin.news, preserved in an Internet Archive capture of March 8, 2026 (archive timestamp 20260308165441), quotes a Science.bio customer email announcing that it “will be permanently closing today.” Pepta Labs has not seen the email itself. A capture of a Science.bio product page on January 28, 2026 shows the store with Add to cart buttons and no closure notice. The first capture found with the notice, of a product page on February 4, 2026, carries a site-wide banner stating that Science.bio has permanently closed. The notice therefore went up between January 28 and February 4, 2026.

Earlier versions of this page gave January 2026 as the closing month without citing a source; the archived forum post above dates the announcement to January 27, 2026, and the archive record places the site notice in the last days of January or the first days of February 2026. Every other closure is listed in the Vendor Shutdown Tracker.

What happened to Science.bio?

Science.bio closed permanently in early 2026 and its site now shows only a closure notice. Science.bio's closure notice, first captured by the Internet Archive on February 4, 2026 as a site-wide banner reading “Science.bio has permanently closed” and in its standalone form on April 20, 2026, states that after careful consideration the company decided to permanently close and discontinue the sale of research products. A customer email dated January 27, 2026, quoted in a forum post archived on March 8, 2026, had announced that it would be permanently closing that day. Science.bio went from an open store to a closure banner over its old catalog, and then to a standalone closure notice. The timeline below includes only events with a dated source; each archive row names or links the capture.

Every Internet Archive capture of a Science.bio page from January 29, 2026 up to the February 4, 2026 capture is an error or redirect response with no page content, so the window cannot be narrowed further. A row is added only when a dated primary source or archived page is cited.

Is the Science.bio official website still online?

The Science.bio official website, science.bio, is still online, but it shows only a closure notice. On September 27, 2026 the page had no storefront, product pages, cart, checkout or order tracking. The notice says that, after careful consideration, the company decided to “permanently close and discontinue the sale of research products.” It thanks its former customers, lists a contact email address and carries no date.

The notice also warns that any website, entity or individual claiming to be Science.bio, claiming to be a successor to Science.bio, or claiming to sell its products is unauthorized and has no affiliation with the company. This page names no other domain as a Science.bio site, and none is authorized by the notice. Pepta Labs is not a successor to Science.bio.

Why did Science.bio close?

Science.bio's site notice gives no reason: it states that the company made the decision to close permanently and names no cause, no closing date and no successor. The customer email of January 27, 2026, quoted in the archived forum post cited above, says: “To be clear, we are closing for regulatory compliance reasons.” This page does not speculate beyond that sentence. If Science.bio or a dated primary source says more, it will be added here with the date it was checked.

No dated public source naming a buyer of Science.bio or of its stock has been found.

Science.bio alternatives: where are Semax and Selank listed now?

Pepta Labs matches two Science.bio item names, Semax and Selank, to its own 10 mg listings by compound name. The table below is built from the live Pepta Labs catalog and refreshes within minutes of a listing change, so price, stock and reported purity follow the product pages.

Because testing is commissioned by the purchasing group, the client field may name the group or source rather than Pepta Labs, and supplier-identifying fields are redacted. Vial labels identify the compound, quantity and research-use designation. They do not carry lot or batch numbers.

Payment methods are shown at checkout. The cart shows the payment method for each item. Free US shipping. The switching guide has the same match, and the full switching guide covers the other closed vendors.

What are the identity records for the four Semax and Selank listings?

Semax and Selank are synthetic linear heptapeptides, and each has a separate N-acetyl amidate listing. The formulas, molecular weights and CAS numbers below are the ones shown on each Pepta Labs product page, and the sequences are from the Pepta Labs compound identity records; the Semax and Selank identity and buying guide covers the sequences and end groups in more depth.

The N-acetyl amidate listings have the same residue sequences as their parents, with an acetyl group on the N-terminus and an amide on the C-terminus, so each is a different chemical entity about 41 Da heavier than its parent.

What about former Science.bio inventory?

Pepta Labs does not sell former Science.bio inventory. An analytical report describes only the production run that was sampled, so it does not carry over to material from another source.

For Pepta Labs listings, the testing represented is independent third-party HPLC purity analysis and mass-spectrometry identity confirmation, commissioned through the purchasing group on a sampled production run from the source. Pepta Labs does not test in-house. Purity is reported as RP-HPLC area-%, identity is by mass spectrometry, and net peptide content is not reported per listing. Sterility, endotoxin or LAL, potency, pharmaceutical-grade, cGMP, contaminant-panel and vial fill-quantity testing are not claimed. Reports are sent by email on request, before you order if you want to see one first, through the report request form. Reading a report line by line is covered in how to verify a peptide CoA.

Where can I check other vendor closures?

Every closure Pepta Labs tracks, with dated sources, is in the Vendor Shutdown Tracker; the Eternal Peptides and Peptide Sciences closures have their own reports. For the vendors still operating and the checks to run on any seller, see best peptide vendors in 2026. For what research peptides are and how their identity is documented, start with what research peptides are.

How is this status page checked?

Pepta Labs rechecks science.bio and the Internet Archive record at least once a month and records the date of each check in the status box above. The Updated date at the top of the page changes only when a check changes what the page says.

Frequently asked questions

Is Science.bio closed?

Yes. Science.bio is permanently closed. As of September 27, 2026, science.bio shows only a notice that the company has permanently closed and discontinued the sale of research products, with no storefront, cart or checkout.

When did Science.bio close?

Science.bio announced its closure on January 27, 2026: a forum post of that date, archived by the Internet Archive, quotes a Science.bio customer email saying it “will be permanently closing today.” Its site notice first appears between January 28 and February 4, 2026: an Internet Archive capture of January 28, 2026 shows the store with no closure notice, and a capture of February 4, 2026 shows the permanent-closure banner. The site notice itself is undated.

Did Science.bio close in 2025 or 2026?

In 2026. Internet Archive captures of January 7 and January 28, 2026 show the Science.bio store open with no closure notice; a customer email dated January 27, 2026, quoted in an archived forum post, said it was closing that day; and the permanent-closure banner is first captured on February 4, 2026. The store was open at the start of 2026, announced its closure on January 27, 2026, and its site notice went up between January 28 and February 4, 2026; nothing in the archive record places the closure in 2025.

Is the Science.bio official website still online?

The domain science.bio is online but shows only an undated closure notice. On September 23, September 24 and again on September 27, 2026, it had no storefront, product pages, cart or checkout. The notice says no other website, entity or individual is authorized to act as Science.bio or its successor.

Why did Science.bio close?

Its site notice says only that the company decided to close permanently and discontinue the sale of research products, with no cause, date or successor named. A Science.bio customer email dated January 27, 2026, quoted in an archived forum post, says it was closing for regulatory compliance reasons; no other reason has been published.

Is Science.bio still selling?

No. As of September 27, 2026, science.bio states that it has permanently closed and discontinued sales, and it has had no cart or checkout since at least April 20, 2026. Its notice warns that any website, entity or individual claiming to be Science.bio, a successor to it, or to sell its products is unauthorized.

What happened to Science.bio in 2026?

Science.bio closed permanently in early 2026. A customer email dated January 27, 2026, quoted in a forum post archived on March 8, 2026, announced that it would be permanently closing that day; its site-wide banner reading “Science.bio has permanently closed” is first captured on February 4, 2026, after a January 28, 2026 capture that still shows the store; and the standalone notice online since at least April 20, 2026 states that the company decided to permanently close and discontinue the sale of research products.

Is Science.bio back in business?

No primary record says so. The undated permanent-closure notice on science.bio is still the company's latest statement as of September 27, 2026, when Pepta Labs checked the domain and found the same notice with no storefront, cart or checkout; the notice says that any website, entity or individual claiming to be Science.bio or its successor is unauthorized. If Science.bio publishes a reopening on its own domain, this page will record it with the date.

Where are Semax and Selank listed at Pepta Labs?

Semax from $27.74 and Selank from $33.24 are each listed as a 10 mg vial of lyophilized powder, with N-Acetyl Semax Amidate from $43.46 and N-Acetyl Selank Amidate from $48.09 as separate 10 mg listings. Each product page shows its reported RP-HPLC purity, and the report for the sampled production run is sent by email on request. Pepta Labs is not affiliated with Science.bio.

When was this status last checked?

Science.bio's status was last checked on September 27, 2026, when science.bio still showed the undated permanent-closure notice. The page is rechecked at least monthly, with the next check due by October 27, 2026.

Sources

• science.bio home page (closure notice, undated), checked by Pepta Labs on September 23, September 24 and September 27, 2026.
• Internet Archive captures of science.bio: home page, January 7, 2026, February 8, 2026, February 24, 2026, April 20, 2026 and September 2, 2026; product pages, January 28, 2026 (archive timestamp 20260128031706), showing the store with no notice, and February 4, 2026 (archive timestamp 20260204115318), the first capture with the permanent-closure banner.
• Internet Archive capture of the rapamycin.news thread “Science.bio closes”, captured March 8, 2026 (archive timestamp 20260308165441): first post dated January 27, 2026 quoting the Science.bio customer email.
• Pepta Labs switching guide, Science.bio entry: mapped item names Semax and Selank.
• Pepta Labs compound identity records for Semax, Selank, N-Acetyl Semax Amidate and N-Acetyl Selank Amidate (sequence, formula, molecular weight); formula and molecular weight are shown on each product page.
• Pepta Labs quality and testing disclosure: testing scope, report access, client-field caveat and vial labelling.

All products are supplied for laboratory research use only and are not for human or animal use.