Featured Peptide Vendors
Every vendor on this page meets the same standard. Its batches are tested by independent third-party labs, and we read each certificate and check it against the lab’s own records. It publishes a purity standard, states its shipping terms plainly, and has responsive customer service. Each profile lists the vendor’s testing lab, catalog and current discount code.
Capstone Peptides
Crush Research
Glacier Aminos
Ion Peptide
Peptide Partners
How We Vet Vendors
Two further criteria sit behind the list: catalog breadth, and a vendor’s reputation in the research community. Meeting every criterion gets a vendor on this page — we don’t score beyond that — and we revisit the list as the market changes.
For a side-by-side breakdown of each vendor’s documented testing, see our Vendor COA & Testing-Transparency Index.
Looking for active discount codes or our peptide research library?
All products are research compounds intended for laboratory use only.