How to choose a research peptide supplier: a green-flag checklist

Sourcing research peptide reagents is mostly a trust problem: the molecule is invisible and the documentation is everything. This checklist covers the signals worth insisting on before you order.

Named, independent testing

Look for a named third-party lab (for example, Janoshik Analytical) rather than a vague "third-party tested" claim. A real Certificate of Analysis states the lab, the method (HPLC, mass spectrometry) and the measured purity, and is tied to the specific lot you receive.

A registered legal entity

A supplier that publishes a registered company name, identification number and address is accountable in a way an anonymous storefront is not. Peptiko operates as Peptiko, a registered Moldovan company.

Honest documentation and logistics

Reagents should be declared accurately for customs as laboratory research reagents, labelled research-use-only, shipped under proper cold-chain, and accompanied by a batch-specific COA you can verify by lot number. Pressure to mislabel a shipment, or a refusal to provide lot-level testing, are red flags.

Related guides

Janoshik Analytical, explained Selank — anxiolytic peptide research Semax — ACTH(4-10) peptide research