What Happened to Peptide Sciences?
Written by NorthPeptide Research Team | Reviewed March 19, 2026
Peptide Sciences, one of the largest US-based research peptide suppliers, ceased operations in March 2026. The company shut down its website, stopped processing orders, and has not publicly announced plans to resume business. The closure followed a period of intensified FDA enforcement targeting peptide suppliers and compounding pharmacies.
Timeline of Events
In late 2025, the FDA increased enforcement actions against companies in the peptide space, particularly those whose products were being used for human administration. Peptide Sciences, which had operated since 2012, began experiencing supply disruptions in early 2026. By March 6, 2026, the website was taken offline and all pending orders were cancelled.
The company did not issue a formal public statement explaining the closure. Industry observers point to the broader regulatory crackdown that also affected other suppliers in the same period, particularly following the Category 2 reclassification of several popular peptides in 2023.
Impact on the Research Community
Peptide Sciences was a primary supplier for many research labs and individual investigators. The sudden shutdown left researchers scrambling for alternatives. It also raised concerns about order data, payment information, and whether unfulfilled orders would be refunded.
Warning: Multiple scam websites have appeared claiming to be Peptide Sciences under a new domain. These are fraudulent. Peptide Sciences has not relaunched under any new URL.
Where to Find Research Peptides Now
Several reputable suppliers continue to operate legally in the US, including NorthPeptide. When choosing an alternative, verify: third-party COAs with HPLC and MS data, US-based operations, transparent contact information, and clear research-use labeling.
Related Resources
Written by NorthPeptide Research Team · For laboratory and research use only. Not for human consumption.
Written by NorthPeptide Research Team
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