American Research Pens or Koi Peptides?
On our stars Koi Peptides comes out ahead, 3.6 to 2.3. Koi Peptides lets you open its certificates before you order; American Research Pens does not, and for a first order that gap matters more than any price. Both take cards.
At a glance
American Research Pens
- StatusTrading
- BasedUS
- Trading sinceNot published
- Outside laboratoryLimited
- Laboratory namedNone
- Certificates open to allNot verified
- Certificates per lotNot verified
- Reference vialNot listed
- Free shipping from$250
- Ways to paycard, wire, ach, e-check, crypto
- Ships abroadNo
- ShelfAbout 10; pens
- FDA letterNone on record
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
- ShelfNot counted; vials
- FDA letterNone on record
Both companies sell materials labeled for laboratory research use only. Full reviews: American Research Pens · Koi Peptides.
Reader questions
So, American Research Pens or Koi Peptides?
On our stars Koi Peptides comes out ahead, 3.6 to 2.3. Koi Peptides lets you open its certificates before you order; American Research Pens does not, and for a first order that gap matters more than any price. Both take cards. The widest gap between them is in paperwork, where Koi Peptides leads.
Can I read a certificate from each before I order?
At American Research Pens we could not find certificates posted openly. At Koi Peptides the certificates are open to anyone and each one is tied to a lot.
Are these reader reviews?
No. Both ratings come from our published formula applied to facts on each supplier’s own pages and in public records. Nobody can submit a rating here.