Free Supplier Checklist
Before You Buy Peptides,
Ask These 7 Questions.
Use this checklist before you buy from any supplier — including us.
No email. No signup. Just use it.
The 7-point checklist
These are the questions we think matter most when evaluating a research supplier. A supplier confident in what they sell should be able to answer all seven without hesitation.
1
Is the supplier a registered US business with a verifiable physical address?
Anonymous operations and PO boxes are the first red flag. Legitimate suppliers operate under a registered LLC or corporation with a traceable address and business registration you can look up.
Pass: Registered US entity, verifiable address, findable on state business registry
Fail: No physical address, PO box only, offshore registration, anonymous operation
2
Is the manufacturer named, and is that facility independently verifiable?
A supplier should name the facility that manufactures their product — not just claim "US quality." That facility's registration should be something you can independently check, not something you have to take on faith.
Pass: Named manufacturer, independently verifiable registration, domestic production
Fail: "US quality" claims without a named manufacturer, overseas production, no facility documentation
3
Is there a third-party Certificate of Analysis (COA) for the specific batch you're buying?
A COA from the supplier's own lab is not independent verification. The COA must come from an accredited third-party laboratory, reference the specific batch number, and be dated within a reasonable window of your purchase.
Pass: Independent third-party lab, batch-specific COA, recent date, lab name verifiable
Fail: In-house testing only, generic undated COA, no batch reference, lab not identifiable
4
Does the COA include all four critical tests — identity, quantity, purity, and metals?
Purity alone isn't enough. Identity confirmation proves the compound is what it claims to be. Quantity confirms the stated amount is actually present. Heavy-metals testing confirms no contamination from synthesis.
Pass: Purity, identity confirmation, quantity assay, and heavy-metals panel all present
Fail: Purity-only COA, missing identity or metals testing, no quantity confirmation
5
Is the product's formulation, storage, and shipping appropriate for that specific compound?
Peptides can differ in stability and handling requirements. A credible supplier should clearly identify the product's formulation, provide appropriate storage guidance, and explain any temperature-sensitive shipping requirements.
Pass: Clear formulation, specific storage guidance, appropriate packaging and temperature controls when required
Fail: Unclear formulation, vague or missing storage guidance, inappropriate packaging, or no explanation of temperature-sensitive handling
6
Does the supplier publish their COAs publicly, or do you have to ask?
Suppliers confident in their testing publish COAs openly. Having to specifically request documentation — especially with delay or pushback — is a signal the documentation may not hold up to scrutiny.
Pass: COAs publicly posted per batch, no request needed, verification link or QR code
Fail: COAs only available on request, delays providing documentation, no public verification
7
Does the seller lead with education and research context — or with hype and health claims?
The language a supplier uses tells you how they operate. Legitimate research suppliers use "research use only" framing, link to published literature, and avoid unsubstantiated therapeutic claims. Hype, before/after photos, and disease-cure language are the kind of claims that draw FDA and FTC scrutiny — and a trust signal of the wrong kind.
Pass: Research-use framing, citations to published literature, honest about what is and isn't known
Fail: Before/after photos, disease-cure claims, influencer hype without citations, no disclaimer
Now you know what to ask.
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