What to Look for in a CBD Certificate of Analysis
Jake Jones
A Certificate of Analysis (COA) is the single most important document when evaluating a CBD product. It's the difference between a product you can trust and one that could contain more THC than advertised, fewer cannabinoids than claimed, or harmful contaminants. Here's how to read one.
What Is a COA?
A COA is a document issued by a third-party analytical laboratory after testing a batch of CBD product. "Third-party" means the lab has no financial relationship with the manufacturer — it provides an independent, objective analysis. Reputable labs are ISO 17025-accredited, meaning their methods and processes have been independently verified for accuracy.
What a COA Should Include
A complete, trustworthy COA includes all of the following panels:
1. Cannabinoid Potency Panel
This shows the concentration of each cannabinoid in the product — CBD, THC, CBG, CBN, CBC, etc. — expressed in mg/g or as a percentage. Check that:
- CBD content matches what the label claims (within ±10-15%)
- Δ9-THC is ≤0.3% (legal limit)
- Total cannabinoid content is specified
2. Pesticide Residue Screen
Hemp absorbs compounds from the soil. A pesticide screen (50-100+ compounds) verifies the hemp was grown without harmful chemicals. All results should be "ND" (non-detected) or below California Prop 65 action levels.
3. Heavy Metals Panel
Hemp is a known phytoremediator — it absorbs heavy metals from contaminated soil. A metals panel should screen for lead, arsenic, cadmium, and mercury, with all results below safety thresholds.
4. Microbial Contamination
Tests for total yeast/mold, E. coli, Salmonella, and other pathogens. Any detectable E. coli or Salmonella is a disqualifying failure.
5. Residual Solvents
If ethanol or other solvents are used in extraction, this panel confirms residual levels are within safe limits. CO2-extracted products generally have minimal solvent residue.
Red Flags to Watch For
- No COA provided, or only an "in-house" test
- COA is more than 12 months old
- Lab name is unfamiliar or unverifiable
- Only a potency panel — missing pesticides, metals, or microbials
- CBD content doesn't match the label
- THC level is at or above 0.3%
Gold Naturals COA Policy
Every Gold Naturals product batch is tested by an ISO 17025-accredited third-party laboratory. COAs are accessible via QR code on each product label and are available on our website. We test for cannabinoid potency, pesticides, heavy metals, microbial contamination, and residual solvents.
Shop CBD You Can Verify
Gold Naturals publishes third-party lab reports (COAs) for every product we sell. Read it before you buy.
Related reading: Why Third-Party Lab Testing Matters for CBD • What Makes a Premium CBD Brand? 5 Things to Look For • How Gold Naturals Is Made: From Seed to Shelf
Frequently Asked Questions
What is a Certificate of Analysis (COA) for CBD?
A COA is a document from an independent third-party laboratory confirming cannabinoid content, purity, and safety. It verifies potency, THC legal compliance, and screens for pesticides, heavy metals, and microbial contamination.
What should a CBD COA include?
A complete COA includes cannabinoid potency, pesticide residue screen, heavy metals panel, microbial contamination test, and residual solvents test — from an ISO 17025-accredited lab.
How do I verify a CBD product's COA?
Scan the QR code on the label or visit the brand's website. Verify the batch number matches your product, the lab is accredited, and CBD content matches the label within 10-15%.
What are red flags on a CBD COA?
Red flags: COA older than 12 months, in-house testing only, missing panels, CBD content significantly different from the label, or THC at or above 0.3%.
