Vendors
Where to Buy
Three suppliers we have vetted, and the codes that take money off your order. Same code, every time you use it.
Active Codes
Third-party purity testing and a certificate of analysis on every product.
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Shop SwissChems
Wide catalog, independent lab testing, fast US-based shipping.
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Shop Limitless Biotech
Research-grade peptides with published COAs and competitive pricing.
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Shop CH PeptidesHow We Vet a Supplier
Peptide quality varies more between vendors than most people expect. These are the four things checked before a supplier goes on this page.
Purity testing
Third-party HPLC and mass spectrometry testing on every batch.
Published COAs
Certificates of analysis you can actually open, with lot numbers and test results.
Track record
A consistent reputation across the research communities that buy from them.
Shipping and handling
Reliable delivery, responsive support, and proper cold-chain handling.
Affiliate Disclosure
The vendor links on this page are affiliate links. If you click one and buy something, we may earn a commission at no extra cost to you. The discount codes are real, and in most cases they save you money you would not get otherwise.
These partnerships do not influence what gets published here. Protocols, dosing tables, and safety information are written independently of any commercial relationship, and no vendor reviews content before it goes up.
This disclosure follows the Federal Trade Commission guidelines on endorsements and testimonials. The Peptide Guides and PeptideWiki.co are both operated by C&E Venture Partners, LLC, and share the same vendor partnerships.