Bright laboratory bench with peptide vials and analytical glassware

Three storefronts · 121 vials

Who is actually cheapest, and how often.

Not a ranking of who paid the most. A count of how many times each vendor holds the lowest cost per milligram on a compound that more than one of them stocks.

The field

Three vendors, one measure

All three are US research suppliers with public catalogues we can read directly. Order below reflects how our readers actually buy; the numbers under each are measured, not editorial.

38 contested compounds
01

ZestyRat Research

SHAUN1010% off with code SHAUN10

The vendor our readers order from most, and every reader order has shipped. Open checkout — no account required. Third-party HPLC on every batch.

  • Stocks 34 of the 42 compounds in this index, across 42 separate vial listings.
  • Holds the lowest cost per milligram on 17 of the 38 compounds more than one vendor carries.
  • Affiliate attribution confirmed live: clicking through sets the vendor's referral cookie before checkout.

Cheapest here:
GlutathioneNAD+GLOW Blend (GHK-Cu + BPC-157 + TB-500)KLOW Blend (GHK-Cu + BPC-157 + TB-500 + KPV)5-Amino-1MQMelanotan I

Open storefront Full review
02

Ascension Peptides

The deepest premium catalog of the four. A free researcher account is required at checkout — about a minute, one time.

  • Stocks 31 of the 42 compounds in this index, across 34 separate vial listings.
  • Holds the lowest cost per milligram on 9 of the 38 compounds more than one vendor carries.
  • Affiliate attribution confirmed live: clicking through sets the vendor's referral cookie before checkout.

Cheapest here:
GHK-CuWolverine Blend (BPC-157 + TB-500)PT-141BPC-157CJC-1295 + IpamorelinSermorelin

Open storefront Full review
03

Dynamic Peptides

WHO/GMP and ISO 9001 US facilities with a published COA on every product page.

  • Stocks 33 of the 42 compounds in this index, across 45 separate vial listings.
  • Holds the lowest cost per milligram on 12 of the 38 compounds more than one vendor carries.
  • Affiliate attribution confirmed live: clicking through sets the vendor's referral cookie before checkout.

Cheapest here:
EpitalonMOTS-cSemaxSelankSemaglutideTesamorelin

Open storefront Full review

The honest caveat

Winning on price is not winning

A vendor can hold the cheapest per-milligram figure on a dozen compounds and still be the wrong order. These are the things this index cannot see.

Time to your door

Dispatch speed and carrier choice are not in a product feed. Reader order history is, and it lives on the vendor reviews at Peptides Uncaged.

What the COA actually says

Publishing a certificate and publishing a batch-matched third-party HPLC certificate are different things. Read the review before the price.

Checkout friction

One of these three requires a free researcher account before you can order. It is a minute of work, once — but it is the difference between an order placed and an order abandoned.