How to Vet a Research Peptide Source
Here is the fear, said plainly. You cannot easily tell a careful US reseller from a rebranded drop-shipper. A slick website, a US phone number, and the words “third-party tested” cost nothing and prove nothing. Plenty of sellers are an overseas supplier wearing a USA costume.
This page is about one question only: is the product authentic? Is it the real compound, correctly identified, free of contamination, and does the amount in the vial match the label? That is a purity and identity question. It is not a human-safety question, and nothing on this page speaks to human use.
Below is a checklist you can use on any source, including this one. For each item we explain what it is, why it matters, and how to check it yourself. Then we tell you plainly how Etched meets it.
The buyer’s checklist
1. A named third-party lab, not just “third-party tested”
What it is. The specific name of the outside lab that tested the product.
Why it matters. “Third-party tested” with no name is a phrase, not proof. Anyone can type it. A named lab can be looked up and held accountable.
How to check. Look for the actual lab name on the product page and on the certificate. If no lab is named, treat the claim as empty.
How Etched meets it. Where an Etched Janoshik report exists, it names the lab: Janoshik Analytical, an independent testing lab. We do not use the vague version.
2. A COA that matches the lot you receive
What it is. A Certificate of Analysis (COA) tied to the exact batch, or lot, in your hands, not a generic sample from months ago.
Why it matters. A COA from a different batch tells you nothing about the vial you were shipped. Quality can change lot to lot. The paperwork has to match the product.
How to check. Find the lot number on your vial. Confirm it matches the lot number on the COA. If they do not match, the COA is decoration.
How Etched meets it. Etched publishes the third-party COA it holds for a compound, where one exists, so the paper matches the product.
3. Mass-spec identity plus HPLC purity, not just one
What it is. Two different tests. Mass spectrometry confirms identity (is this actually the molecule it claims to be). HPLC measures purity (how much of the sample is the target compound versus impurities).
Why it matters. One test alone leaves a gap. A purity number means little if identity was never confirmed. Confirming identity means little if you do not know how pure it is. You want both.
How to check. Read the COA. Look for a mass-spec result confirming the compound and an HPLC result giving a purity percentage. If only one appears, half the question is unanswered.
How Etched meets it. Etched COAs from Janoshik include mass-spec identity confirmation and an HPLC purity result. Both, on the same certificate.
4. Results published and lookup-able, not “available on request”
What it is. The COA is posted where anyone can pull it up, with no email, no account, no login.
Why it matters. “Available on request” is a stall. It lets a seller send a favorable document, or a document for a different batch, or nothing at all. Published results cannot be swapped after the fact.
How to check. Try to find the COA yourself before you buy. If you have to ask a salesperson for it, that is a warning.
How Etched meets it. Etched COAs are published and open. No login. The reports that exist are listed at etchedresearch.com/coa.
5. US-based fulfillment with a real address
What it is. The order ships from inside the US, from a company with a real, registered business address.
Why it matters. A US storefront that quietly drop-ships from overseas is a different animal than a US operation holding US inventory. A real, registered address means a real entity you can identify.
How to check. Look for a stated business address and a stated ship-from location. A company that hides both is telling you something.
How Etched meets it. Etched Research LLC ships from the USA and is a registered Wyoming company based in Sheridan, Wyoming.
6. A purity threshold stated as a number
What it is. A specific minimum purity, written as a percentage, not a mood word like “premium” or “high quality.”
Why it matters. “Pure” is marketing. A number is a standard you can hold the seller to and check against the COA.
How to check. Find the stated threshold, then confirm the HPLC number on the COA meets or beats it. The claim and the certificate should agree.
How Etched meets it.
Always check the COA yourself
Do not take our word for any of this. Take the certificate.
Pull up the COA for the lot you are looking at, read the lab name, confirm the batch number matches your vial, and read the mass-spec and HPLC results with your own eyes. You can look up the reports that exist at etchedresearch.com/coa, with no login. That is the whole point of publishing them.
For Research Use Only. Not for human consumption. Etched Research supplies compounds for laboratory and research use only. Nothing on this page is medical advice, a health claim, or a recommendation to use.