Peptide Supplier Red Flags
The signals we use to score supplier transparency: third-party testing, batch documentation, refund clarity and bias risk.
Last updated: 15 April 2026
Transparency signals
Trustworthy suppliers publish lab partners, batch-level COAs, manufacturing locations, and clear policies. Opaque suppliers hide all of this behind marketing.
Claim signals
Watch for therapeutic claims, before-and-after photos, and dosing protocols on the supplier's site. These are warning signs that the supplier is operating outside the boundaries of research-use supply.
Logistics signals
Stealth packaging, refusal to provide invoices, payment-only-in-crypto, and refusal to ship to common addresses are all friction points worth weighing carefully.