About pep.deals
pep.deals is an independent price-comparison tool for research-use-only peptides. We track what vendors list, normalize every price to landed cost per milligram, and put the numbers side by side so a comparison takes seconds instead of a spreadsheet. The site is free to use. We do not sell, ship, or handle any product.
We are not affiliated with any vendor. No supplier pays for placement, and no ranking is for sale. When a buy link earns us a commission we say so, and it never changes the order of the table or the price you pay.
How we gather prices
Prices come from each vendor's own public storefront. An automated job reads their catalog on a daily schedule and records the list price, pack size in milligrams, vials per pack, and stock state for every listing we can match to a known peptide. We store a price snapshot over time so a page can show whether a number is holding steady or moving.
Snapshots can lag a vendor's live site for a short window, and a parser can occasionally misread an unusual listing. That is why every row links straight to the vendor's product page. Treat our number as the starting point and confirm the final total at their checkout.
How we compute cost per mg
A $60 vial and a $60 vial are not the same deal if one holds twice the peptide. So we reduce every listing to one comparable figure: landed cost per milligram. The math is list price plus a shipping estimate, divided by the total milligrams in the pack (milligrams per vial times the number of vials).
Verified store-wide discount codes roll into the figure when we can tie a code to a vendor with confidence. Salts and counter-ions are not normalized automatically yet, so cost per mg uses the milligrams printed on the SKU. We note that on peptide pages rather than hide it.
Coupons and transparency badges
Every discount code is checked before it goes live, and stale codes drop off automatically. Anyone can submit a code; we verify it first.
Each vendor profile carries transparency badges for the questions a buyer actually asks: is the certificate of analysis recent and independent, how long has the business operated, does it ship from the US, does it reship a lost or damaged order, does it take non-crypto payment, and does it publish a refund policy. Every badge links to the evidence behind it. When we cannot verify a claim we mark it "needs proof" instead of guessing. See our COA standards for how we read lab paperwork.
What we don't do
Everything we list is sold by third parties as research-use-only material. We publish sourcing facts only. You will not find dosing, reconstitution, or human-use guidance anywhere on the site, and nothing here is medical advice or an endorsement of any use case. Full terms are on our disclaimers page.
Run a vendor and want to correct a badge, fix a listing, or talk about a partnership? See partners or contact us.
Independent and reader-supported through affiliate links. Research use only. Not for human or animal consumption.