Understanding Cannabis Lab Tests and Certificates of Analysis (COAs)
QUALITY & SAFETY
Understanding Cannabis Lab Tests
and Certificates of Analysis (COAs)
The complete 2026 guide to reading lab tests and COAs. What to look for, red flags, potency, contaminants, and how to verify product safety.
Potency • Contaminants • Terpenes • Safety
SECTION 01 • HOW TO READ
What a COA Shows You
📊
Key Sections
Potency (THC/CBD + minors), terpene profile, contaminants (pesticides, heavy metals, microbes), and residual solvents.
Must-Check Items
- Total cannabinoidsMatches label claim
- PesticidesBelow safe limits
- Heavy metalsNone detected
- MicrobesPassed
SECTION 02 • RED FLAGS
What to Avoid
No COA
Never buy from brands that won’t provide a recent lab report.
Failed Tests
High pesticides, heavy metals, or microbial contamination = unsafe product.
Outdated
COA must be from the current batch — check the date and batch number.
SECTION 03 • PRACTICAL TIPS
How to Verify a Product
01
Scan the QR code on the package
02
Search the batch number on the brand’s website
03
Look for third-party lab (not in-house)
04
Check for ISO/IEC 17025 accreditation
The Bottom Line
Always demand a recent, third-party COA. It’s the only way to know exactly what you’re buying and that it’s safe and accurately labeled.
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