About PepAssess

PepAssess is an independent directory of research peptide vendors. It sells nothing and ships nothing. It lists 79 vendors, compares 54 peptides by price per mg, and scores each vendor on what it publishes and what PepAssess could confirm.

How lab reports are checked

PepAssess reads the lab reports a vendor publishes and looks each one up with the lab that issued it. A report counts as confirmed only when the lab's own records return it. So far 5,942 reports have been read and 3,788 confirmed, across 70 vendors. PepAssess keeps a page on each of 18 testing labs behind those reports.

How coupon codes are checked

A code is listed with the amount it takes off. To check one, PepAssess adds a product to a cart on the vendor's store, enters the code and reads the discount the cart shows. Nothing is ordered. 53 of the 78 codes listed have a cart test on file, the most recent on November 12, 2026.

How prices are read

Prices come from each vendor's own store. The price per mg is the vial price divided by the amount in the vial, and the with-code price is that figure with the vendor's listed discount taken off. Prices for vendors with a code were last read on November 12, 2026.

What the Evidence Score is

Each vendor has a score out of 100 built from lab reports confirmed with the issuing lab, how often it tests, what its reports show, business details, buyer protection and track record. The checks and their points are on How scores work, and the figures behind the site are on About the data.

Corrections and contact

Listing on PepAssess is by review. A vendor that believes a report, price or detail is wrong can write to hello@pepassess.com or use the contact form; PepAssess checks the claim against the lab or the store and corrects the record. The terms cover how the site may be used.

To use the directory, start with the lowest peptide prices with a coupon code or the full list of peptide coupon codes.