Quick answer: Although Peptide Sciences closed in March 2026, the research peptides it previously offered are still available from other vendors, including Peptide Hackers, which provides a similar catalog and documentation.
If you had experience with Peptide Sciences, you were likely regularly acquiring specific research peptides. Those compounds did not disappear when the company closed in March 2026; only the vendor did. This guide provides a simple map of what Peptide Sciences was known for and where you can source each one now, including from Peptide Hackers.
Research Peptides: From Peptide Sciences to Modern Sourcing
Key Research Peptides Available
These were the staples of the Peptide Sciences catalog, and they are all available now.
- For tissue repair research, related products such as BPC-157 and TB-500 are in stock.
- For metabolic research in the GLP group, products like semaglutide, tirzepatide, and retatrutide are available.
- For longevity and skin research, GHK-Cu is a related product.
- For melanocortin research, PT-141 is also available for use in laboratory studies.
Researchers can browse and view the full product catalog, which includes more than fifty-six research compounds across major classes. If a compound is not listed above, it is very likely still available at Peptide Hackers. Human use is not intended.
Consistent Documentation and Product Catalog
The reason many researchers trusted Peptide Sciences was documentation and a deep catalog. Both carry over to the new vendor. Every product at Peptide Hackers ships with a per batch Certificate of Analysis, HPLC verified purity, and mass spectrometry confirmation, so you are not taking anyone's word for what is in the vial.
Enhanced Transparency and Accessibility
Enhanced accountability and transparency are key differentiators. Peptide Sciences was a website that closed overnight with no clear refund policy, impacting many researchers and leaving them searching for a new source. Peptide Hackers operates two physical storefronts, one in Los Angeles at 2029 Century Park East and one in Newport Beach at 4695 MacArthur Court, offering same-day in-person pickup. This allows researchers to view the product and obtain documentation directly.
How to make the switch
Find the research peptide you used to order, confirm it on the product page, and view the Certificate of Analysis. If you are local, order online and pick it up the same day in Los Angeles or Newport Beach. If you are not, shipping is available.
For a comprehensive understanding of the Peptide Sciences shutdown and a detailed comparison of vendors, including Peptide Hackers, refer to our Peptide Sciences shutdown breakdown and the Peptide Sciences vs Peptide Hackers comparison. These resources address common questions about product availability and vendor reliability.
All products are for laboratory research only. Not for human or veterinary use.
The Importance of Laboratory Analysis for Research Peptide Purity
For any research involving peptides, the purity and accurate identification of the compounds are paramount. Without rigorous laboratory analysis, the integrity of experimental results can be compromised. Researchers rely on documentation such as Certificates of Analysis (COA), High-Performance Liquid Chromatography (HPLC) results, and mass spectrometry data to confirm that the peptide received matches the specifications required for their studies.
These analytical methods provide objective evidence of a peptide's purity level and molecular structure, helping to ensure that studies are conducted with consistent and reliable materials. For instance, HPLC analysis quantifies the percentage of the target peptide and identifies impurities, while mass spectrometry confirms the exact molecular weight, thereby verifying the peptide's identity. [1] Vendors like Peptide Hackers emphasize providing this level of transparency to support the scientific community.
References
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.