Directory
USA peptide vendors
Every profile includes an original Transparency Index score, last-reviewed date, and a source note. Illustrative profiles are labeled as such.
Purgo Labs
US-facing research catalog with clear lot documentation habits
Cedar Analytical
Documentation-first boutique catalog for common research peptides
Northbound Research
Midwest-shipped research vials with batch-forward product pages
Atlas Bench Chem
Institutional-style storefront with PO-friendly checkout notes
Vector Vial Co.
Comparison-friendly pricing grid with weekly updates
Harbor Peptide Supply
High-volume catalog with open pricing tables
Pine Ridge Peptides
Regional US seller focused on classic research staples
Lumen Forge Bio
Newer US catalog emphasizing rapid restocks