October 2026 issue · Editors' star ratings, never reader reviews · How we rate
Rated.Peptides

A buyer's magazine for research peptide suppliers

Head to head · October 2026

Paramount Peptides or QSC?

On our stars Paramount Peptides comes out ahead, 3.6 to 2.8. Paramount Peptides lets you open its certificates before you order; QSC does not, and for a first order that gap matters more than any price. Neither shows card payments, so weigh how you would get your money back if an order went wrong.

3.6 / 5
Editors’ rating, not reader reviews
Paperwork4.4
Company3.5
Price3.3
Shopping3.1
QSC
No. 28 of 49 · read the review
2.8 / 5
Editors’ rating, not reader reviews
Paperwork2.0
Company3.9
Price3.5
Shopping2.4

At a glance

Paramount Peptides

  • StatusTrading
  • BasedIrvine, CA
  • Trading since2012
  • Outside laboratoryYes
  • Laboratory namedJanoshik
  • Certificates open to allYes
  • Certificates per lotYes
  • Reference vialNot listed
  • Free shipping from$500
  • Ways to payNot stated
  • Ships abroadNo
  • ShelfAbout 78; vials, capsules, blends
  • 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: Paramount Peptides · QSC.

Reader questions

So, Paramount Peptides or QSC?

On our stars Paramount Peptides comes out ahead, 3.6 to 2.8. Paramount Peptides lets you open its certificates before you order; QSC does not, and for a first order that gap matters more than any price. Neither shows card payments, so weigh how you would get your money back if an order went wrong. The widest gap between them is in paperwork, where Paramount Peptides leads.

Can I read a certificate from each before I order?

At Paramount 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.