How to Read a Hemp Lab Report (COA): A Simple Guide

If you've ever shopped for hemp products online, you've probably seen the term COA — short for Certificate of Analysis. Brands use it as a trust signal, but most shoppers have no idea how to actually read one. This guide breaks it down in plain language so you can shop smarter and safer.

What Is a COA?

A Certificate of Analysis is a document issued by an accredited third-party laboratory that independently tests a hemp product. It confirms what's actually in the product — cannabinoid levels, purity, and safety — separate from any claims the brand makes on its packaging.

A legitimate COA is always conducted by a lab that has no financial relationship with the brand being tested. If a brand only references in-house testing, that's a red flag.

The Key Sections of a COA

1. Cannabinoid Potency Panel

This is the most important section. It lists all cannabinoids detected in the product and their concentrations, typically expressed as a percentage (%) or milligrams per gram (mg/g). Key cannabinoids to look for:

  • THCA: The raw, non-psychoactive precursor to Delta-9 THC. High THCA = potent when smoked or vaped.
  • Delta-9 THC: The psychoactive compound. Must be below 0.3% by dry weight for federal hemp compliance.
  • CBD: Non-psychoactive cannabinoid associated with calm and wellness.
  • CBG, CBN, CBC: Minor cannabinoids that contribute to the overall effect profile.
  • Total THC: Often calculated as: Total THC = (THCA x 0.877) + Delta-9 THC. This gives you the actual potency after decarboxylation.

2. Terpene Profile (if included)

Terpenes are the aromatic compounds that give hemp flower its flavor and influence its effects. A detailed terpene panel is a sign of a premium, transparent product. Common terpenes include myrcene (relaxing), limonene (uplifting), and caryophyllene (calming).

3. Pesticide Screening

This panel confirms the product is free from harmful agricultural chemicals. Look for a "Pass" result across all tested pesticides. Any "Fail" or detected pesticide above action limits is a serious concern.

4. Heavy Metals Testing

Hemp plants are bioaccumulators — they absorb heavy metals from soil. This panel checks for lead, arsenic, cadmium, and mercury. Again, you want a clean "Pass" across the board.

5. Residual Solvents

Relevant for extracts, concentrates, and vape oils. This confirms that no harmful solvents used during extraction (like butane or ethanol) remain in the final product above safe limits.

6. Microbial Testing

Checks for harmful bacteria, mold, and yeast. Especially important for flower and edibles. A passing result means the product is safe for consumption.

How to Verify a COA Is Legitimate

  • Check the lab name: Search for the lab online and confirm it's a real, accredited facility (look for ISO 17025 accreditation).
  • Check the date: COAs should be recent — ideally within the last 12 months for the specific batch.
  • Match the batch number: The COA batch or lot number should match what's printed on your product packaging.
  • Look for a QR code: Many brands include a QR code on packaging that links directly to the COA for that batch.

COA Transparency at The High Lift

At The High Lift, we believe every customer deserves to know exactly what they're consuming. That's why we provide full, third-party lab reports for every product we carry. You can access all our lab reports on our Lab Reports page.

Shop with confidence — browse our full collection of lab-tested hemp products today.

Back to blog