Testing platform
Uzorak: what we could verify
Not a lab. Zagreb, Croatia (partner lab). Not named on the COAs of any vendor we track. Checked Oct 16, 2026.
- Website
- uzorak.com
- Location
- Zagreb, Croatia (partner lab) [1]
- Accreditation
- Its FAQ says it is not ISO 17025 accredited. [2]
- How to check a COA
- Sample IDs can be checked at uzorak.com/verify. [2]
Is it real? What we checked
Not a lab A testing platform, not a lab: its Terms say a Hong Kong IT company runs it and “does not conduct laboratory analysis”, and that Stamper Lab d.o.o. in Zagreb does the testing. We couldn't check that lab's registration. How every lab name compares.
- Yes Its own website. uzorak.com calls itself a peptide testing lab; its Terms describe “a specialized online platform providing management, logistics, and data processing services for chemical analysis”. [3] [4]
- Unknown A registered company. Its Terms name Mozart International Limited of Hong Kong as the operator and Stamper Lab d.o.o. of Zagreb for the testing; Croatia's court register is closed to crawlers. [4]
- Partly A published lab address. It gives its lab address as Stamper Lab d.o.o., Radnicka 52, Zagreb; no official record we could search lists a lab there. [1]
- No Accreditation, checked with the accreditation body. Its FAQ says it is not ISO 17025 accredited. [2]
- No Its claims match the records. Its Terms and Privacy pages refer to “accredited partner laboratories” and an “accredited testing facility”, while its FAQ says it isn't accredited. [4] [5] [2]
- Yes Independent of vendors. No ownership tie found; it calls itself the partner testing lab for Peptaura, a peptide marketplace. [2]
- Yes COAs can be checked with the lab. Sample IDs can be checked at uzorak.com/verify. [2]
- Under 1 yr Domain age. uzorak.com was registered on November 18, 2025. [6]
How it tests, what it costs and who can send samples
What Uzorak’s own pages say, read Oct 16, 2026. Its standard test matches the HPLC retention time against a reference standard, which doesn’t measure the molecule’s mass. Compare every lab.
- Who can send samples
- Individuals and companies, worldwide
- Basic test (identity, purity, quantity)
- USD 200 to 440 per peptide (HPLC-UV); HRMS package USD 1,080
- Endotoxin test
- USD 180 per vial
- Turnaround
- 2 to 5 working days; LC-MS 4 to 8
- Samples from abroad
- Yes (lab in Zagreb, Croatia)
- Results
- Customer decides; free public report link
- Identity method
- HPLC retention time; high-resolution LC-MS (Q-TOF) in its USD 1,080 package
- Quantity method
- Against an external reference standard
- Sterility test
- Coming soon
- Chromatogram on the report
- Yes, raw instrument data
Published prices
Uzorak doesn't publish prices that we could read.
Compare what labs charge to test a peptide, who takes samples from individuals and how each lab confirms identity.
Vendors whose COAs name Uzorak
None of the vendors we track names Uzorak on its COAs.
How to verify a Uzorak COA, with every lab's lookup side by side.
Uzorak: questions people ask
Is Uzorak legit?
Our verdict: not a lab. A testing platform, not a lab: its Terms say a Hong Kong IT company runs it and “does not conduct laboratory analysis”, and that Stamper Lab d.o.o. in Zagreb does the testing. We couldn't check that lab's registration. The checks behind it are listed above, and every lab name we checked is compared in one place.
How do I check a Uzorak COA?
Sample IDs can be checked at uzorak.com/verify. Then check that the batch number on the report matches your vial.