Issue 02 · Quarterly

The independent ranking of US research peptide vendors.

Editorial benchmarks across catalog depth, analytical documentation, shipping logistics, payment flexibility, and pricing transparency. Updated every quarter — no sponsored placements, no affiliate prioritisation, no marketing copy from vendors.

Updated May 2026 · 4 active rankings · 16+ vendors analysed

About this publication

Best Research Peptide Guide is an independent editorial project benchmarking research peptide vendors operating in the US market. Produced by a small editorial team led by Dr. Marcus Whitfield, PhD and Devon Reyes — no sponsorships, no affiliate prioritisation, no paid placements.

Read about the team →

How we rank

Rankings are weighted across seven criteria: catalog depth, format diversity, analytical documentation, third-party verification, shipping logistics, payment flexibility, and pricing transparency. Scores are capped at 9.9 because no vendor is perfect.

Read the full methodology →