US-manufactured research peptides with a public, per-lot COA database — every product searchable by its own report number, tested by independent labs at 99% stated purity.
The Standard
Independently documentedBioLongevity Labs scores 45 of 100 on our Standard, placing it in the Independently documented tier. US-manufactured research peptides with a public, per-lot COA database — every product searchable by its own report number, tested by independent labs at 99% stated purity.
Returns are prohibited on research peptides and no lost-package guarantee is published, so the recourse if an order goes wrong is thinner than the lab documentation suggests — pay by a method that gives you a chargeback. Match the COA report number in their public database to the lot on your vial before use.
Every point is earned from a transparency signal BioLongevity Labs publishes — weighted by what actually protects a researcher. A vendor cannot buy a better score; the Standard is the same for everyone.
Reship on loss· not published
A published policy for a package that arrives damaged or never arrives at all — the recourse that matters most when something goes wrong in transit.
Refund policy· not published
A stated money-back or returns policy you can actually hold them to, rather than an order that is final the moment it ships.
Independent testing
HPLC and mass spec run by an outside lab (Janoshik, MZ Biolabs) — not an in-house bench grading its own homework.
COA on file
A certificate of analysis you can actually pull for the product — the paperwork, not a promise.
Per-batch, lot-matched
Every batch tested and the certificate matched to your specific lot — not one reference batch reused forever.
Visit BioLongevity Labs
You leave AmericanPeptide for the vendor’s own site. Always request and match the third-party COA for your specific lot before any use.
Go to BioLongevity LabsAffiliate 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.
24 compounds from our catalog. Compounds with a · have a multi-vendor sourcing comparison.