If you used Peptide Sciences, you were probably buying the same handful of compounds again and again. Those compounds did not disappear when the company closed in March 2026. Only the vendor did. So this is a simple map of what Peptide Sciences was known for and where you can source each one now.
Every compound below is carried by Peptide Hackers with the documentation Peptide Sciences customers came to expect, and then some.
The compounds Peptide Sciences was known for
These were the staples of the Peptide Sciences catalog, and they are all available now.
- For tissue repair research, BPC-157 and TB-500.
- For metabolic research in the GLP group, semaglutide, tirzepatide, and retatrutide.
- For longevity and skin research, GHK-Cu.
- For melanocortin research, PT-141.
The full catalog runs more than fifty six research compounds across the major classes, so if a compound is not listed above, it is very likely still on the shelf at peptidehackers.com.
What stays the same, and what gets better
The reason people trusted Peptide Sciences was documentation and a deep catalog. Both carry over. 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.
The part that gets better is accountability. Peptide Sciences was a website that closed overnight with no refund process. Peptide Hackers runs two physical storefronts, one in Los Angeles at 2029 Century Park East and one in Newport Beach at 4695 MacArthur Court, with same day in person pickup. You can see the product and get the paperwork in hand before you pay.
How to make the switch
Find the compound you used to order, confirm it on the product page, and check 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 the full story on why Peptide Sciences closed and how the two companies compare, see our Peptide Sciences shutdown breakdown and the Peptide Sciences vs Peptide Hackers comparison.
All products are for laboratory research only. Not for human or veterinary use.
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.