Last updated: February 2026
Introduction
Laboratory testing is one of the most important factors when evaluating hemp products. Because hemp classification depends on cannabinoid concentration, independent testing verifies both compliance and transparency.
This guide explains what lab reports are, what they show, and how to read them.
What Is a COA?
A COA (Certificate of Analysis) is a third-party laboratory report documenting cannabinoid content and safety screening results.
Reputable hemp retailers publish COAs so customers can verify product information rather than relying on marketing descriptions.
You can view example lab reports here.
Why Testing Determines Classification
Hemp is defined by Delta-9 THC concentration measured on a dry-weight basis.
If the measured Delta-9 THC level remains within federal limits, the material qualifies as hemp. If it exceeds that threshold, it falls under regulated cannabis categories.
Because appearance does not determine classification, testing documentation is essential.
What a COA Shows
A complete laboratory report typically includes:
Cannabinoid Profile
Lists measured cannabinoid percentages including Delta-9 THC and other naturally occurring compounds.
Compliance Verification
Confirms whether the sample meets hemp standards.
Safety Screening
May include contaminant analysis such as heavy metals or residual compounds depending on laboratory scope.
How to Read a COA
When reviewing a lab report, check:
- Sample name matches the product
- Laboratory identification and date
- Measured Delta-9 THC percentage
- Verification status
Transparency allows customers to independently confirm product documentation.
Why Retail Transparency Matters
Retailers providing accessible testing documentation help customers make informed decisions and verify regulatory standards.
Customers comparing documented indoor-grown strains often review products like Mendo Runtz hemp flower and Gushers hemp flower alongside their laboratory reports.
You can browse additional indoor hemp flower options and compare documentation.
Testing vs Drug Screening
Lab testing confirms regulatory classification, while drug screenings detect biological metabolites. These processes measure different things.
If unfamiliar, review our drug test guide.
Legal Considerations
Testing documentation supports compliance verification, but consumers should still review local regulations using our state legality guide.
Final Thoughts
Laboratory testing is the foundation of hemp transparency. Reviewing COAs allows consumers to verify cannabinoid content and documentation before purchasing.
Understanding how to read lab reports helps buyers evaluate products confidently.