Peptide Sciences Shutdown: Questions of Record

Updated August 21, 2026

Peptide Sciences announced closure on March 6, 2026 and stopped processing orders that day. This page answers the questions readers actually bring to the event — return, refunds, cause, legitimacy of sites using the name — in one or two dated lines each, drawn from the verified record only.

Each answer below is the record's answer, with its date or source attached. Where the record is silent, the answer says so; "not in the verified record" is a finding, not a dodge. A fuller page is linked from each entry.

When did Peptide Sciences shut down?

March 6, 2026 — closure announced and order processing halted the same day, with the website offline within days, per trade coverage collected at the closure event record.

Why did it close?

The company gave no detailed explanation. Coverage placed the closure against the 2024–2026 enforcement backdrop — FDA letter batches, GLP-1 litigation pressure, import restrictions — as attributed context, not as a stated cause; the sequence is dated at the enforcement timeline.

Has Peptide Sciences come back?

No verified relaunch appears in the record as of August 21, 2026, and the company made no statement about returning. The full status ledger is at is Peptide Sciences coming back?

A site is selling under the Peptide Sciences name — is it the same company?

The company's own March 6, 2026 notice declared any further sales under its brand fraudulent, and unaffiliated sites reusing the branding have been observed since. Checks for a specific site are at the clone-site identification method.

Can buyers with open orders get refunds?

The record contains no refund procedure published by the company and no wind-down process for orders open at the halt. What a buyer can document — order records, payment entries, dates — is set out at orders and refunds after the closure.

How large was the company?

Third-party traffic estimates placed it in a revenue class of roughly $7.4 million per month at closure, the largest US vendor in the category — an industry estimate, not an audited figure.

Did FDA send Peptide Sciences a warning letter?

None appears in this index's verified record. The December 10, 2024 and March 31, 2026 batches name other companies — see the April 2026 batch record — and the closure notice itself named no regulator.

Did anyone at the company face charges?

Not in the verified record. The adjudicated criminal case of the period concerns a different vendor, Paradigm Peptides, whose owner was sentenced July 30, 2026 — see the Paradigm Peptides case record.

Where did the displaced buyers go?

The record does not track individual buyers, and this index recommends no vendor. What it does record is the evaluation standard a displaced buyer can apply anywhere — testing, per-order documentation, cited claims, published policies — at the verification criteria after the Peptide Sciences closure, with the period's entity-by-entity records at the vendor landscape index.

Sources

Peptides Explorer — Peptide Sciences closure report. peptidesexplorer.com/blog/peptide-sciences-shut-down
BioStrata Research — closure analysis. biostrataresearch.com
The Peptide List (Substack) — closure and aftermath coverage. thepeptidelist.substack.com
CBS News — Paradigm Peptides sentencing report. cbsnews.com
US FDA — warning-letters index. fda.gov