Rated Peptides
Compare · October 2026

Koi Peptides vs UK Peptides

Koi Peptides scores higher, 7.1 to 5.4 out of 10. Both let you open a certificate before you spend anything, so certificates will not separate them. Both take cards.

Updated 2026-10-19 · Editorial scores, not user reviews

7.1
Editors' scoreGood · #5 of 49Editorial score, not user reviews.
Quality8.2
Trust6.3
Value6.5
Experience6.9
5.4
Editors' scoreMixed · #31 of 49Editorial score, not user reviews.
Quality1.9
Trust6.4
Value7.5
Experience7.4

At a glance

The same facts for both, side by side.

Koi Peptides

  • StatusTrading
  • BasedSheridan, WY (registered address); warehouses Austin, TX and Long Beach, CA
  • Trading since2022
  • Outside laboratoryYes
  • Laboratory namedFreedom Diagnostics
  • Certificates open to allYes
  • Certificates per lotYes
  • Reference vialNot listed
  • Free shipping from$200
  • Ways to paycard, ach, wire
  • Ships abroadYes
  • CatalogNot counted; vials
  • FDA letterNone on record

UK Peptides

  • StatusTrading
  • BasedMiddlesbrough, England
  • Trading since2012
  • Outside laboratoryNo
  • Laboratory namedNone
  • Certificates open to allYes
  • Certificates per lotNot verified
  • Reference vialNot listed
  • Free shipping fromNot stated
  • Ways to paycard, wire
  • Ships abroadYes
  • CatalogAbout 79; vials
  • FDA letterNone on record

Both companies sell materials labeled for laboratory research use only. Full reviews: Koi Peptides · UK Peptides.

Questions

So, Koi Peptides or UK Peptides?

Koi Peptides scores higher, 7.1 to 5.4 out of 10. Both let you open a certificate before you spend anything, so certificates will not separate them. Both take cards. The widest gap is in quality, where Koi Peptides leads.

Can I read a certificate from each before I order?

Koi Peptides posts certificates anyone can open, each tied to a lot. UK Peptides posts certificates anyone can open.

Are these user reviews?

No. Both scores come from our published formula applied to facts on each supplier’s own pages and in public records. Nobody can submit a rating here.