Quick answer: The research peptide market experienced significant shutdowns in 2025 and 2026 due to a convergence of FDA enforcement, pharmaceutical litigation, criminal cases, new legislation, and payment processor restrictions. Research peptides are compounds used primarily for laboratory research, and these shutdowns affected the availability of these products in the USA and beyond.
The research peptide market went through the biggest shakeout it has ever seen across 2025 and 2026. A long list of vendors, including the largest names in the space, shut down in under a year. This article provides a view of the vendors that closed, the compounds affected, and the factors driving these results. We will update it as the picture changes.
Research Peptide Vendors That Shut Down and Their Products
- Peptide Sciences. The largest and most established research peptide vendor, based in Henderson, Nevada. It shut down permanently on March 6, 2026, with no announced refund process, leaving a large base of customers stranded. It had reported roughly $7.4 million in online sales in December 2025 alone.
- Science.bio. Closed permanently on January 27, 2026. Unlike most of the others, it wound down responsibly and committed to fulfilling or refunding outstanding orders before it shut the doors.
- Amino Asylum. Forced offline in June 2025 after FDA agents raided its warehouse. This was the first physical raid of a major vendor and it put the whole market on notice.
- Paradigm Peptides, Royal Research, and others. Part of the same wave. At least eight major vendors closed or went dark between the middle of 2025 and early 2026.
Why the Research Peptide Market Shut Down
No single cause explains the shutdowns. Instead, several forces converged on the same business model at the same time.
- FDA enforcement. Warning letters went out to multiple peptide sellers in December 2024, and more than fifty letters went to GLP related compounders and manufacturers in September 2025. The June 2025 raid on Amino Asylum raised the stakes from letters to physical action.
- Pharmaceutical litigation. Eli Lilly filed a trade complaint in March 2024 over imported tirzepatide, and a January 2025 trade ruling blocked infringing tirzepatide imports broadly.
- Criminal cases. The Department of Justice secured guilty pleas tied to illegal peptide distribution in late 2025, moving the pressure from civil to criminal.
- New legislation. Federal legislation was introduced in early 2026 to explicitly ban selling research chemicals that are biologically identical to approved drugs.
- Payment processors. Many began treating peptide sales as high risk and cutting vendors off, which choked the operations that survived everything else.
Where Researchers Source Research Peptides Now
The closures left many researchers asking the same questions: Where can I get research peptides now? How do I verify the legitimacy of products and vendors? And how can I avoid vendors that suddenly disappear with my money?
Peptide Hackers carries many of the research peptides these vendors were known for, providing products with per batch Certificates of Analysis, HPLC-verified purity, and mass spectrometry confirmation on every order. It also operates two physical storefronts in Los Angeles and Newport Beach, allowing researchers to pick up compounds the same day in person and pay at the counter rather than prepaying a website that might not be there next week.
For the deeper story, see our Peptide Sciences shutdown breakdown, the Science.bio alternative guide, and the catalog guide to where each compound is sourced now. These resources help researchers navigate the current landscape of research peptide products and vendors.
All products are for laboratory research only. Not for human or veterinary use.
Understanding Research Peptides and Their Use
Research peptides are short chains of amino acids used primarily in laboratory research to study biological functions and disease mechanisms. These compounds are distinct from approved drugs and are intended solely for experimental use. The market for research peptides includes a variety of products with different biological targets and applications.
Researchers rely on verified products with clear content and purity to ensure reliable results. The recent vendor shutdowns have impacted access to these compounds, making it important to understand sourcing and verification methods.
How to Verify Research Peptide Vendors
Given the recent market disruptions, verifying the legitimacy of research peptide vendors is critical. Researchers should look for vendors that provide detailed Certificates of Analysis (COA), including HPLC and mass spectrometry data, to confirm compound purity and identity.
Physical storefronts and transparent business practices can also indicate reliability. For detailed guidance, see How to Verify a Research Peptide Vendor in 2026 (COA, HPLC, and Track Record).
Research Use Only
This article is provided for educational purposes. All peptides discussed are sold for research use only and are not intended for human consumption or therapeutic use.