Peptide Sciences says it voluntarily shut down operations and discontinued sales of its research products. Its own notice warns that supposed successor sites using its name are unauthorized. It does not describe a DOJ-ordered closure or explain what will happen to each outstanding order.
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What does the company's notice actually establish?
The notice is direct about the decision: the company will no longer sell its research products. It gives no decision date, business rationale or reopening plan and does not address individual transactions. (Peptide Sciences)
The successor warning is unusually pointed. Peptide Sciences says it retains rights to its name and intellectual property and disavows websites or individuals claiming affiliation or permission to sell its products. A matching logo on another storefront does not establish that the original company operates it.
Did the FDA or DOJ force the closure?
The word 'voluntarily' appears in the company's notice; no agency order is cited there. That does not reveal every consideration behind the decision, but it rules out presenting the notice itself as proof that FDA or DOJ forced the business to close.
FDA did write to Gram Peptides in March 2026 about that company's website claims and research-only label. Gram is a different seller. Its warning letter cannot supply the missing government action against Peptide Sciences, no matter how often the two names appear in the same industry discussion. (FDA)
What does the successor warning cover?
The company's warning concerns misuse of its name and intellectual property by claimed successors. It does not endorse another seller or describe a continuation of Peptide Sciences' research-product sales.
A Peptide Sciences alternative is a different seller, not an endorsed successor merely because it advertises similar research materials. Our separate research-supplier guide covers documentation questions; IQON Labs appears in commercial placements on this page, not as a company-endorsed replacement.
The notice establishes a voluntary end to sales and a warning about claimed successors; it does not identify a government-ordered closure.
Frequently Asked Questions
What happened to Peptide Sciences?
Peptide Sciences says on its website that it voluntarily shut down operations and discontinued research-product sales. The notice does not say the DOJ or another agency directed the closure.
Did the DOJ shut down Peptide Sciences?
The company's notice does not say that. The sources reviewed for this article do not establish a DOJ-directed closure.
Is Peptide Sciences coming back?
The published notice does not announce a reopening date. It warns that claimed successors and third-party sellers using its identity are unauthorized.
Is a Peptide Sciences alternative an authorized successor?
The company disavows third-party sellers claiming affiliation or permission to sell its products. A different seller is not an authorized successor merely because it offers similar research materials; IQON Labs appears in commercial placements on this page, not as a company-endorsed replacement.
Related Coverage
A dated company statement naming an authorized successor or announcing resumed sales would change the answer. The published notice instead says sales have ended and disavows purported successors.
Buy 1, Get 1 20% Off
Pick any two research compounds. Take 20% off the lower priced one.
Applied automatically at checkout, no code needed
Claim my 20% off →In every pair, the lower priced item is 20% off after other discounts; accessories excluded. For research use only.
Updated September 26, 2026. For information only, not medical or legal advice. IQON Labs appears in commercial placements on this page. Research products are not for human consumption.