AmericanPeptide doesn’t sell Chelohart. It ranks where to get it by one thing: the provenance tier of each vendor’s purity claim. A vendor that publishes an independent, per-batch COA backs a third-party claim; one that only states its own number backs a vendor-reported one. Same scale as the rest of the site — the Standard.
Ranked by the tier of each vendor’s purity claim, strongest first; within a tier, by transparency score. We show every source and do not average purities across vendors — a median across a third-party COA and a self-reported number is a figure belonging to neither. The paid partner, where present, is disclosed at its honest tier, not pinned above it.
Publishes a third-party, per-batch COA you can match to your specific lot.
Amino Club
Our lead sourcing partner: a US research-peptide distributor where every batch ships a lot-matched third-party COA (MZ Biolabs / Janoshik) at ≥99% HPLC purity, backed by free reship on loss and a 60-day money-back guarantee.
COAs are independently verifiable via the Janoshik / MZ Biolabs report number on each certificate — confirm the report for your specific lot. 60-day money-back guarantee; change-of-mind returns are excluded.
Paramount Peptides
US research-peptide supplier — "Real Science. Real Standards." — with independent third-party HPLC testing on every batch, ≥99% purity, and COAs searchable by product or batch number.
Ships FedEx 2Day to the US and Puerto Rico only. Independent testing is stated but the lab is not named on the public pages; verify the COA for your batch number before use.
Affiliate disclosure. AmericanPeptide does not sell peptides. This is an independent third-party vendor, and we may earn a commission if you register or buy through this link — at no extra cost to you. Listing and ranking are based on published transparency signals, never on commission; where a card is labeled “Featured partner,” that placement is paid, and it buys position rather than a better score.