How we score and price

search.peptides compares research-peptide listings by price per mg and shows each vendor’s independent lab record. It is for researchers comparing vendors before they buy. It sells nothing and takes no commission.

Price per mg

Each listing’s price is the vendor’s own, converted to US dollars on the day it was read. Price per mg is that price divided by the total milligrams in the listing: the size of one vial times the number of vials in the pack. Listings sold in IU or another unit are ranked by that unit and never compared with mg. Out-of-stock listings stay in the list, marked.

Vendor score

The 0 to 100 score is Finnrick’s, shown as published. Finnrick is an independent service that lab-tests peptides sold by vendors and rates the vendors on the results. We do not compute, adjust or sell scores. A vendor with no Finnrick record shows as unscored.

Lab tests and “passed”

Lab test counts are Finnrick’s independent test results for that vendor. “Passed” on a listing means the vendor has at least one passing independent test for that peptide; it does not mean that exact batch or listing was tested. A peptide page lists every tested vendor with its passes, failures and latest test date. Findings from certificates of analysis come from documents the vendor publishes itself.

Contact details

Emails, phones, WhatsApp, Telegram and socials are read from each vendor’s own website (weekly) and from Finnrick’s vendor records (every three days).

How fresh it is

Prices and lab results are re-read every hour, and new vendors are looked for every six hours. Last read 2026-10-19 12:02 UTC. Right now: 18,647 listings, 1,982 vendors, 11,184 lab tests.

Corrections

Wrong price, dead link, or a vendor’s details out of date? Open an issue.