KORECOA vs Janoshik vs US Labs: Which Peptide Testing Service Is Right for You?
An objective comparison of the three main options for independent peptide analytical testing in 2026 — pricing, turnaround, total cost, and what each does best.
The Big Picture
If you're buying peptides from Chinese or Indian manufacturers, you need independent testing to verify what you're actually getting. The three main options are: Janoshik Analytics (Czech Republic), US-based labs (MZ Biolabs, ACS, Krause), and KORECOA (Seoul, South Korea).
Each has genuine strengths. This comparison breaks down the real differences — not just the sticker price, but the total cost of ownership including shipping, customs risk, and turnaround time.
Side-by-Side Comparison
| Feature | Janoshik | US Labs | KORECOA |
|---|---|---|---|
| Location | Czech Republic | USA | Seoul, South Korea |
| HPLC + MS Price | $220–$340 | $350–$550 | $249 |
| Full Panel Price | $380–$450 | $500–$800 | $399 |
| Lab Turnaround | 5–12 days | 10–14 days | 5–7 days |
| Ship from China | 5–10 days, $80–$150 | 5–10 days, $80–$150 | 2–3 days, $15–$30 |
| Total Turnaround | 10–22 days | 15–24 days | 7–10 days |
| Total Cost (Test + Ship) | $300–$500 | $430–$700 | $264–$429 |
| Customs Seizure Risk | Moderate (EU) | Higher (US/DEA) | Low (intra-Asia) |
| QR Verification | No | No | Yes |
| Public Results DB | Limited | No | Yes |
| Certified Vendor Program | No | No | Yes |
| Multi-Language Support | English, Czech | English | EN, KR, ZH, JP |
| Accreditation | Private lab | DEA licensed | ISO/IEC 17025 partners |
The Hidden Cost: Total Cost of Ownership
Most buyers compare sticker prices — but the real cost includes shipping, customs risk, and time. Here's what a typical test actually costs when you factor everything in:
Example: Testing a Semaglutide batch from Shenzhen
Janoshik route: $220 test + $100 shipping + 15 days = $320, 15–22 day turnaround
US lab route: $450 test + $120 shipping + customs risk = $570, 15–24 day turnaround
KORECOA route: $249 test + $20 shipping + no customs = $269, 7–10 day turnaround
Where Each Service Wins
Janoshik Analytics — The Community Standard
Strengths: Longest track record in the peptide community. Massive trust built over years. Lowest base price for simple HPLC tests. The "default" choice most people know.
Limitations: One-man operation (scalability risk). No QR verification or tamper-proof COAs. Turnaround can be unpredictable during high volume. Shipping from Asia to Czech Republic adds 5–10 days and $80–$150.
US Labs (MZ Biolabs, ACS, Krause) — Domestic Comfort
Strengths: Based in the US. DEA licensed for controlled substances. Familiar for US vendors and researchers. Good for domestic samples already in the US.
Limitations: Most expensive option ($350–$550+ per test). Slowest turnaround (10–14 days lab time, plus shipping). Highest customs seizure risk when shipping from Asia. No verification portal or public database.
KORECOA — The Asia-Pacific Advantage
Strengths: Closest to where peptides are manufactured (2–3 day shipping from China/India). Lowest total cost of ownership. QR-verified tamper-proof COAs. Public results database. Certified Vendor Program. Multi-lab partner network with ISO/IEC 17025 accreditation. Four-language support.
Limitations: Newer to the market (launching 2026). Building community trust from scratch. Not US-based (matters for some domestic-only researchers).
Who Should Use What
Use Janoshik if you're an individual buyer who wants the established community standard and doesn't mind the wait.
Use a US lab if your samples are already in the US and you need DEA-licensed testing for scheduled compounds.
Use KORECOA if you're sourcing from Asia (most vendors are), you need fast turnaround, you want verifiable COAs with QR codes, or you're a vendor who wants the Certified Vendor seal for your business.
The Speed Advantage
If your peptides are manufactured in China or India — which covers 80%+ of the global market — KORECOA is the only service where you can have a verified COA before your bulk shipment even clears US/EU customs. That's not a small difference. That's a structural advantage.
The Bottom Line
There's no single "best" testing lab — it depends on where your samples are and what you need. But for the 80%+ of the market sourcing from Asia, the math is clear: KORECOA offers the fastest turnaround, lowest total cost, and most modern verification infrastructure.
The peptide industry is moving toward verified, traceable, tamper-proof testing. That's the direction KORECOA is building toward — not just testing, but a certification standard.