AmericanPeptide is built as a trust layer for research peptides — not a storefront. Three commitments hold the whole thing together: catalog chemistry is cross-referenced against public records, sources are ranked only by verifiable transparency, and every claim stays research-grade. Here is exactly how each one works.
Chemistry, cross-referenced
Every catalog entry's formula and molecular weight is checked against its PubChem reference record. Only confident matches carry a "verified" badge.
43 / 63 entries confirmed
Sources ranked by trust
Where-to-source listings are ordered by verifiable transparency signals — third-party COAs, per-batch testing, published policies — never by commission. A paid Featured partner slot can sit above that ranking; it is labeled as paid and scored like everyone else.
Scores are never for sale
Research-grade, not medical
This is a computational research reference for scientists and educators. Nothing here is medical advice, dosing guidance, or an offer for sale.
No fabricated data, ever
A catalog is only as trustworthy as its worst entry. So rather than restate a molecular formula and hope it’s right, an automated fact-QA pass checks each compound against its reference record in PubChem, the NIH’s open chemistry database.
A match only counts when it is unambiguous. A curated PubChem CID is authoritative; name-resolved entries additionally have to contain nitrogen and match the catalog molecular weight within tolerance. Anything short of a confident match gets no badge — so the on-page “Chemistry verified” claim stays honest by construction, and the compound’s CID and check date are shown so you can confirm it yourself.
43
Entries PubChem-confirmed
63
Total catalog entries
2026-08-17
Most recent cross-check
AmericanPeptide does not sell peptides. It points researchers to external vendors — and the ranking is the whole product. Every vendor earns a transparent 0–100 trust score derived only from verifiable transparency signals — weighted toward what actually protects a buyer. Fulfillment and recourse (reship on loss, a refund policy) count for more than lab paperwork: a published COA is by now a market-standard marketing signal, and per-lot matching isn’t the fraud shield it’s sold as. Independent testing still counts — it just isn’t the whole of trust.
| Transparency signal | Weight |
|---|---|
| Reship on carrier loss | +30 |
| Published refund policy | +25 |
| Independent third-party HPLC/MS testing | +20 |
| Per-lot COA available to customers | +15 |
| Per-batch (lot-level) testing, not one reference COA | +10 |
| Commission / payment | +0 |
The three tiers a score files into
Independently documented
Publishes a third-party, per-batch COA you can match to your specific lot.
Vendor-claimed testing
States third-party testing or COAs — not yet independently confirmed here.
Unvetted
Insufficient public transparency signals to place higher.
Add a vendor and it self-files into the right band from its own signals — there is no manual ordering, and no amount of commission moves a score. 3 vendors currently carry a disclosed affiliate relationship; each is marked, each outbound link uses rel="sponsored nofollow", and the score is computed the same way whether we earn a commission or not.
One kind of placement sits above the ranking rather than inside it. A vendor we work with directly can hold a Featured partner slot on the compounds they stock — always labeled as paid, always carrying its own unedited score and tier, and never eligible at all if its published signals put it in the bottom band. It buys position, not standing.
We keep that slot because the most useful diligence is the part a checkbox column structurally cannot hold: whether we know the operators by name, whether someone accountable answers when an order goes wrong, whether the business clears card payments — which means a processor underwrote it and the buyer keeps their chargeback rights. Those are real signals about how a company behaves. They simply aren’t machine-readable, so they sit beside the score, in writing, instead of quietly inside it.
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.
The two systems above look separate — catalog chemistry checked against a registry, vendors ranked by transparency — but they are one idea applied twice: grade a claim by where it came from, not by how confident it sounds. That scale runs under the whole site, and it is shared with our sister reference, peptidehormone.com. A molecular weight confirmed against PubChem is reference-grade. An independently documented vendor backs a third-party purity claim; a vendor that only states its own numbers backs a vendor-reported one. Six tiers, strongest to weakest:
Vendor bands map onto the scale
A sourcing page’s floor
Evidence floorVendor-reportedREF1PRE1VEN1The floor is the weakest load-bearing claim on a page: a compound with PubChem-grade chemistry but only vendor-reported purity floors at vendor-reported. That reconciliation is live for GHK-Cu — see the source aggregator, where each vendor’s purity claim wears its tier.
No fabricated data
Catalog, vendor, and pricing datasets ship empty rather than invented. If a trust signal isn’t published by the source, the flag stays off and the caveat goes in writing.
Not a store
We hold no inventory and process no orders. Sourcing links are external editorial references, disclosed as affiliate where applicable.
Not medical advice
Every compound page is a research and educational reference. Nothing here is diagnosis, treatment, dosing guidance, or an offer for sale.
AI outputs are hypotheses
The research agent and computational tools produce hypotheses to be independently validated — never clinical conclusions.