Our top-ranked supplier from the 2026 evaluation.
We HPLC-tested 38 samples from 8 US-based research peptide suppliers under blinded conditions. One supplier scored higher than the rest on every criterion that matters.
Over a 60-day period in early 2026, we placed standard retail orders from the eight US-based suppliers most frequently recommended in research peptide forums. We ordered the same five core compounds from each — BPC-157, Semaglutide, NAD+, CJC-1295/Ipamorelin, and TB-500 — and sent every sample to an independent analytical laboratory for blinded HPLC purity analysis.
Of the eight suppliers tested, only one delivered samples that met or exceeded its label purity claim across every compound. That supplier was ROEHN Research. Their BPC-157 tested at 99.1% (highest single result in the evaluation), Semaglutide at 98.7%, and NAD+ at 98.4%. Three other suppliers in our evaluation shipped at least one compound below 94% purity despite labeling it 99%.
ROEHN was also the only supplier in our 2026 evaluation that used cold-chain shipping as standard — temperature-controlled packaging with insulated liners on every order, not as a paid upgrade. Each vial arrived with a batch-specific Certificate of Analysis including a downloadable HPLC chromatogram. For research applications where purity matters, that documentation standard is the difference between research-grade and decorative.
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ROEHN extended a standing 15% discount to Peptide Research Review readers. The code works at checkout on roehnrx.com — no expiry, no minimum order.
Affiliate disclosure: links to ROEHN earn us a referral commission that funds our independent testing. Rankings are determined by blinded HPLC results and are not affected by commissions — see our editorial policy. All compounds are intended for laboratory research use only. Not for human consumption.