PeptidesSource is a US-based vendor offering both retail and bulk sales, shipping from the United States. The catalogue spans 47 peptides, with third-party testing from Freedom Diagnostics covering 9 of those products across 12 certificates of analysis — recent reports average 99.7% purity. Around a fifth of the catalogue has published COAs, and the vendor lists prices on most products it carries.
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Anecdotal signals
Testing coverage
Price
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We don't issue verdicts — we publish the evidence and let it speak. We hold 10 captured lab documents (COAs) for this vendor. Our automated site audit has verified the vendor's published catalogue and COA surface. The sections on this page hold the evidence behind each of those numbers.
6 of 34 observed peptides have a COA mapped to them. Latest captured reports are from Freedom Diagnostics.