Bright laboratory bench with peptide vials and analytical glassware

Four storefronts · 127 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

Four vendors, one measure

All four 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.

39 contested compounds
01

ZestyRat Research

SHAUN1010% off with code SHAUN10

The vendor our readers order from most, and every reader order has shipped. Ships the same day on orders placed before 3pm ET, USPS Priority. A free researcher account (21+) is set up once at checkout.

  • Stocks 38 of the 46 compounds in this index, across 47 separate vial listings.
  • Holds the lowest cost per milligram on 18 of the 39 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 32 of the 46 compounds in this index, across 35 separate vial listings.
  • Holds the lowest cost per milligram on 9 of the 39 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 46 compounds in this index, across 45 separate vial listings.
  • Holds the lowest cost per milligram on 12 of the 39 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
04

Amino Club

SHAUN22None

ISO 17025 third-party COAs and a 99%+ purity guarantee. Catalog sits behind a free researcher account, so live per-vial prices are not published here.

  • Stocks 0 of the 46 compounds in this index, across 0 separate vial listings.
  • Holds the lowest cost per milligram on 0 of the 39 compounds more than one vendor carries.
  • Affiliate attribution confirmed live: clicking through sets the vendor's referral cookie before checkout.

Cheapest here:
—

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 four 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.

How we review suppliers

Vial Prices is an independent research library. We do not manufacture, stock, price, test or ship anything. We review suppliers on their published testing standards, reputation, fulfilment record and pricing, and the ratings we publish are our own editorial assessment.

Every compound referenced on this site is sold by its vendor strictly as a research chemical for in-vitro laboratory research only — not for human or animal consumption, and not intended to diagnose, treat, cure or prevent any disease. Nothing here is medical advice. We earn a commission on orders placed through our links, at no additional cost to you; all material connections are disclosed in line with FTC guidelines.