Source — research-grade vendors, vetted for disclosure.

Where peptides actually come from.

Every peptide on the market starts somewhere — in a synthesis lab, with a raw-material supplier, with a reference-standard provider. These are research-grade vendors widely used by self-directed peptide users. PepStakk lists them because knowing where your supply originates is part of knowing what you’re stakking. Per regulatory labeling, products are sold for laboratory and research purposes, not for human consumption. We surface what’s disclosed; you decide.

Disclosed Source — vetted disclosure, not endorsement.

PepStakk vets each Source vendor’s disclosure practices: third-party COAs, testing methodology, sourcing, country of origin, lab partners. We confirm the disclosure is complete and internally consistent. We do not perform certification, and we do not represent any listing as suitable for human consumption — that’s not what a Source-tier listing means. The decision authority sits with you, the self-guided user. PepStakk is the intelligence and management platform; we provide the information.

Minimum disclosure to be listed.

• Identity, purity by HPLC, endotoxin, sterility, heavy-metals testing matrix — and an explicit declaration of which tests the source actually performs versus skips.
• Country of origin and manufacturing location.
• Third-party lab name, last batch test dates, COA upload per active product line.
• Signed research-use-only attestation (regulatory labeling — vendor confirms they sell for laboratory and research purposes).

Clear about what we did and didn’t do.

• We’ve vetted the vendor’s disclosure for completeness and consistency.
• We’ve confirmed what testing they perform — and what they don’t.
• We’ve surfaced their COAs, country of origin, and third-party lab partner so you can review them yourself.
• We have NOT certified the lab partner or independently audited the COAs.
• We have NOT represented any listing as suitable for human consumption. Per regulatory labeling, products are sold for laboratory and research purposes.
• We strongly recommend consulting a licensed clinician before any therapeutic protocol.

Hard disqualifiers.

• Refusal to disclose third-party testing scope.
• Marketing of products for human use under any label or sub-brand (vendor must respect regulatory labeling).
• Failure to sign minimum disclosure attestation.

How a Source-tier listing is marked.

Per regulatory labeling: research / laboratory use. Consult a licensed clinician before any therapeutic protocol.