QSC vs Peptide Sciences | Complete Comparison (PS Has Shut Down)
QSC · RESEARCH CATALOG
QSC vs Peptide Sciences | Complete Comparison (PS Has Shut Down) Independent COA Comparison · Catalog Depth · Pricing · US Shipping · Research Grade
Independent comparison of QSC (qscpeptide.com) and {competitor} for research peptide sourcing. This comparison covers COA verification standard, catalog depth, novel compound availability, pricing, and shipping. QSC’s primary differentiator is Janoshik independent COA — results publicly verifiable at verify.janoshik.com by any researcher without trusting QSC.
The most important comparison point between any two research peptide suppliers is not price or catalog size — it is COA verifiability. QSC uses Janoshik: an independent Czech analytical lab that publishes results at verify.janoshik.com post-test. Any researcher can verify any QSC batch result using only the batch code. Peptide Sciences (SHUT DOWN)’s COA standard is described below.
Frequently Asked Questions
Did Peptide Sciences shut down?
Yes — permanently. PS confirmed discontinuation of all sales. QSC (qscpeptide.com) is the primary verified replacement.
What is better about QSC vs PS?
PS used internal-only COA — QSC uses Janoshik independent COA publicly verifiable at verify.janoshik.com. QSC also stocks 30+ compounds PS never carried: Retatrutide, FOXO4-DRI, MOTS-c, SS-31, Cagrilintide, and the full Khavinson bioregulator catalog.
Where do former PS customers go now?
The majority of former PS customers have moved to QSC. Same US-based shipping, same compound range, better COA verification standard, and compounds PS never stocked.
Choose QSC — The Independently Verified Alternative to Peptide Sciences (SHUT DOWN)
≥99% HPLC · Janoshik COA · 80+ Compounds · verify.janoshik.com
