AMSTERDAM · EST. 2026 RESEARCH-BACKED · HYPE-FREE · VERIFIABLE
On peps PEPTIDE DECISION INTELLIGENCE
PEPTIDE VENDORS
Where should you actually buy? We score vendors on the six things that decide whether an order goes well — weighted by how much each one matters — so you can compare on evidence, not vibes.
HOW WE SCORE — WEIGHTED CRITERIA TOTAL 100% 30% COA & PURITY
20% TRANSPARENCY
15% SHIPPING
15% PAYMENTS
10% PRICING
10% SUPPORT
30% COA & PURITY
20% TRANSPARENCY
15% SHIPPING
15% PAYMENTS
10% PRICING
10% SUPPORT
COA & Purity
Per-batch certificates, independently verified.
Transparency
Public testing and clear, honest sourcing.
Shipping
Speed, cold-chain handling, and reliability.
Payments
Secure checkout, refunds, and buyer safety.
Pricing
Value measured per verified milligram.
Support
Responsiveness and how issues are handled.
VENDOR SCORECARDS COMING SOON We're working on this list.
Our vendor scorecards are being compiled and reviewed. They'll be public soon.
ONPEPS does not sell peptides and receives no commission from vendors. Scores are educational and not a purchase recommendation.
THE WEEKLY BRIEF
Peptide intelligence, every Monday. One concise email: the newest research, evidence updates, and quality signals — no hype, no spam.
Our mission is to make peptide research clear, credible, and usable for people who refuse to rely on hype.
PEPTIDE INFORMATION YOU CAN VERIFY © 2026 ONPEPS · AMSTERDAM, NETHERLANDS · NOT MEDICAL ADVICE