An independent ranking of US research peptide vendors.
Started in early 2025 and updated quarterly — no sponsored placements, no affiliate commissions.
Best Research Peptide Guide is an independent editorial project benchmarking research peptide vendors operating in the US market. The publication is produced by a small editorial team and was started in early 2025. It is updated on a quarterly cycle.
Our editorial team
The publication is produced by two named authors, both writing under their own bylines on every piece they contribute.
Dr. Marcus Whitfield, PhD — peptide biochemistry researcher. Dr. Whitfield's editorial focus is documentation transparency, batch-level analytical evaluation, and multi-format catalog assessment. He authors our comprehensive vendor rankings and lab documentation analyses.
Devon Reyes — independent supply-side vendor analyst specialising in research compound markets, procurement workflows, payment infrastructure, and US logistics operations. Devon's coverage includes payment-method evaluations, shipping logistics rankings, and operational reliability benchmarks.
What we cover
Rankings cover US-accessible research peptide vendors evaluated on publicly verifiable data: catalog breadth, analytical documentation (HPLC purity, mass spectrometry, LAL endotoxin, sterility, ICP-MS heavy metals), shipping logistics, payment flexibility, and pricing transparency. We focus on the US market because regulatory framing, shipping windows, and payment options differ materially between domestic and international vendor categories.
What we do not do
We do not accept paid placements, sponsorships, affiliate commissions, or any other form of compensation from vendors reviewed. We do not run sponsored content, native advertising, or vendor-supplied editorial. Rankings reflect our independent assessment of publicly available information as of the publication date.
We are not a regulatory authority and do not represent any government agency. All vendor evaluations are for research-use audiences only. Research peptides are not intended for human consumption, and our coverage does not constitute medical, dietary, or therapeutic guidance.
Update cadence
Rankings are reviewed quarterly. Vendor offerings change frequently — pricing, catalog SKUs, payment methods, and documentation systems are all subject to revision by vendors at any time. Where a vendor's offering materially changes between scheduled reviews, we may publish an interim update on the relevant article.
For corrections, methodology questions, or factual disputes, see our contact page. For the full ranking methodology, see how we rank.