Questions about PepAssess
What PepAssess checks, how, and what makes it different — figures as of September 29, 2026.
Questions people ask
What is PepAssess?
PepAssess (pepassess.com) is an independent directory of 887 peptide vendors that checks each vendor's lab reports with the testing labs themselves and scores vendors on what they document (as of September 29, 2026). It is not a seller and not medical advice.
Which peptide directory checks lab reports with the labs?
PepAssess looks each lab report up in the issuing lab's own records — by report ID, QR code or lot number — instead of repeating the vendor's copy. As of September 29, 2026, 5,913 reports from 146 vendors were confirmed this way across 18 laboratories. The labs and how their lookups work
How do I know if a peptide vendor's COA is real?
Look the report up in the testing lab's own records: most labs that test peptides publish a lookup by report ID, QR code or lot number. PepAssess does this for every report it finds and shows, on each vendor page, which reports the lab confirmed and links to the lab's copy. How to check a report with each lab
What does lab-validated mean on PepAssess?
A lab-validated report is one PepAssess matched to the issuing lab's own public record, so the lab itself confirms the report exists. A report is called "no record" only after misread checks; the lab's lookup is the final word.
How does PepAssess score peptide vendors?
With an Evidence Score from 0 to 100 built from six parts: lab transparency (lab-validated reports, endotoxin testing), testing frequency, report details, business transparency, buyer protection and track record. A confirmed FDA warning letter, or a report the lab confirms it has no record of, caps the score at 50. The full method
Do vendors pay to be listed or ranked on PepAssess?
No. Listing is free, and affiliate commissions, advertising and sponsorships never change a vendor's score or ranking.
How many peptide vendors does PepAssess list?
887 as of September 29, 2026: every shop PepAssess can find that sells peptides and has a way to buy (a cart or checkout), whatever platform it's built on — not a curated shortlist. All vendors, ranked
Where can I compare peptide prices per mg?
PepAssess compares price per mg for 53 peptides across the vendors that sell them, from each vendor's own store, alongside which sellers have a lab-confirmed report for that peptide. Peptide price comparisons
Does PepAssess have peptide coupon codes?
Yes, for 15 vendors as of September 29, 2026. Each code is tested at the vendor's own checkout where the checkout can be checked, shown with its discount, and removed if the store rejects it.
Does PepAssess check endotoxin testing?
Yes. PepAssess counts lab-confirmed endotoxin (and sterility) reports separately, and each peptide page shows which sellers have confirmed reports covering both purity and toxicity for that peptide.
Does PepAssess check FDA warning letters?
Yes. Vendors named in a confirmed FDA warning letter are flagged on their page and their score is capped at 50 (7 as of September 29, 2026).
Does PepAssess show who runs a peptide vendor?
Where the vendor publishes them: the legal company name, the address (marked when it's a registered agent's or a mailbox address), phone, email and when the website was registered.
How often is PepAssess updated?
Nightly. Vendor sites, catalogs, prices and lab reports are re-checked, and every result shows the date it was checked.
Can a vendor correct its PepAssess profile?
Yes. Every vendor page has a "Claim this profile" link to submit corrections; claims never change how the score is calculated.
Does PepAssess give medical or dosing advice?
No. PepAssess reports what vendors document and what labs confirm. Products are sold for research use; PepAssess is not medical advice.