Compare before you buy.
Compare peptide prices across verified suppliers, normalised to cost per mg, with lab-verified COAs and current discount codes.
Fast, accurate, transparent peptide monitoring for the modern researcher. We built PepLookup because comparing peptide pricing across suppliers meant opening a dozen tabs and doing the cost-per-mg math by hand, normalising every listing down to one number lets you see the real comparison in one place.
The short version
What is PepLookup?
PepLookup is an independent peptide price comparison website. It lists research peptide suppliers side by side and shows what each one charges per milligram, so researchers can see which supplier is cheapest for a given compound without doing the maths by hand.
PepLookup also collects the certificates of analysis suppliers publish and the coupon codes they offer, and links every listing straight to the supplier’s own product page. PepLookup is not a shop: it sells nothing and ships nothing.
- Suppliers compared
- 85
- Peptides tracked
- 38
- Priced listings
- 3,171
- Listings with a COA
- 2,213
Counted live from the PepLookup catalogue.
Three steps
How PepLookup works
- 1
We read each supplier's own prices
PepLookup records the prices suppliers publish on their own product pages, along with stock status and the time each price was seen. Nothing is estimated or filled in.
- 2
Every listing becomes a cost per mg
A 5 mg vial, a 10 mg vial and a 10-vial kit can't be compared by sticker price. PepLookup divides each price by the total milligrams in the pack, so every supplier is ranked on the same number.
- 3
COAs and coupon codes sit beside the price
Where a supplier publishes a certificate of analysis, PepLookup links it from the listing, and where a supplier has a discount code, the code is shown next to its prices.
Supplier pages on PepLookup are checked by Adam Dan. Browse the supplier directory, compare peptide prices per mg or read the published lab reports.
Explore
What you can do on PepLookup
- Compare prices per mgEvery supplier that sells a compound, ranked by cost per milligram.
- Browse suppliersEach supplier's products, prices, shipping, payment options and COAs.
- Find coupon codesThe current discount code for every supplier we track, ready to copy.
- Check COAsCertificates of analysis that suppliers publish, by compound and supplier.
- Use the free toolsPrice per mg, reconstitution and COA reading, worked out for you.
- Get the Chrome extensionPepLookup codes on supported supplier stores, copied or filled in one click.
Real numbers or none at all
Every price on this site carries the time it was last observed. We show empty states rather than a placeholder price, a fabricated review count, or a mocked-up COA.
Ranked by price, not commission
When we do earn a commission from a listed supplier, it never changes the price a buyer pays and never changes where that supplier ranks. That policy is disclosed on every page it applies to.
We are a comparison tool, not a seller
PepLookup does not manufacture, sell, or ship anything. Every purchase happens directly between you and a third-party supplier, see our full disclaimer for the details.
Join the research community
Discuss protocols, share verified suppliers and swap notes with other researchers in our Skool community.
Join the communityQuestions, corrections or partnerships?
We read every message. Reach us on the contact page or at info@peplookup.com.
New here? Read What is PepLookup?