Koi Peptides or QSC?
On our stars Koi Peptides comes out ahead, 3.6 to 2.8. Koi Peptides lets you open its certificates before you order; QSC does not, and for a first order that gap matters more than any price. Koi Peptides takes cards and QSC does not, which decides it for anyone who wants chargeback rights.
At a glance
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
QSC
- StatusTrading
- BasedQingdao, Shandong
- Trading since2008
- Outside laboratoryLimited
- Laboratory namedJanoshik Analytical Laboratories
- Certificates open to allNot verified
- Certificates per lotNot verified
- Reference vialNot listed
- Free shipping fromNot stated
- Ways to paycrypto, wire
- Ships abroadYes
- ShelfAbout 75; vials, bulk
- FDA letterNone on record
Both companies sell materials labeled for laboratory research use only. Full reviews: Koi Peptides · QSC.
Reader questions
So, Koi Peptides or QSC?
On our stars Koi Peptides comes out ahead, 3.6 to 2.8. Koi Peptides lets you open its certificates before you order; QSC does not, and for a first order that gap matters more than any price. Koi Peptides takes cards and QSC does not, which decides it for anyone who wants chargeback rights. The widest gap between them is in paperwork, where Koi Peptides leads.
Can I read a certificate from each before I order?
At Koi Peptides the certificates are open to anyone and each one is tied to a lot. At QSC we could not find certificates posted openly.
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.