How to Read a Cannabinoid Certificate of Analysis (COA)
A Certificate of Analysis (COA) is the document that guarantees the quality, safety and legality of a cannabis or hemp product. But, do you know how to interpret a Cannabinoid Certificate of Analysis (COA) correctly? In this guide we teach you how to read a Cannabinoid Certificate of Analysis (COA) like an expert, avoiding fraud and ensuring that you are consuming or selling reliable products.
1. What is a COA and why is it important?
A COA is a report issued by an independent laboratory detailing:
- **Cannabinoid profile ** (CBD, THC, CBG, etc.).
- **Contaminants ** (pesticides, heavy metals, microbes).
- **Legal compliance ** (THC levels according to regulations).
Without a COA, there is no guarantee of:
- That the product is safe.
- That the declared concentrations are real.
- Comply with the law (avoiding penalties).
2. Key Parts of a COA
🔹 Header (Basic Data)
- Name of laboratory: Must be accredited (ISO 17025).
- Date of analysis: An old COA does not reflect the current state of the product.
- Batch ID: Each product must have its specific COA.
⚠️ Alert: If there is no date or lot ID, be wary.
🔹 Cannabinoid Profile
The most important section. It must include:
- Total THC (THCA * 0.877 + THC): Must be below 0.2% or 0.3% (depending on country).
- Total CBD (CBDA * 0.877 + CBD): Check that it matches the label.
- Other cannabinoids (CBG, CBN, THCV): May add therapeutic value.
đź“Ś Example:
| Cannabinoid | % by weight | | --- | --- | | THC | 0.12% | | THCA | 0.05% | | CBD | 12.3% | | CBDA | 1.8% |
👉 Total THC = (0.05 × 0.877) + 0.12 = 0.16% → Legal in EU and USA.
🔹 Contaminant Analysis
A safe product must indicate “Not Detected” or levels below legal limits in:
- Heavy metals (lead, arsenic, cadmium, mercury).
- Pesticides (chlorpyrifos, glyphosate, etc.).
- Microorganisms (E. coli, Salmonella, molds).
đź“Ś Example of a pesticide table:
| Pesticide | Legal Limit (ppm) | Result | | --- | --- | --- | --- | | Glyphosate | 0.1 | | âś… | | Chlorpyrifos | 0.01 | | âś… |
🔹 Signature and Accreditations
- Signature of the laboratory manager.
- Accreditation logo (e.g. ISO 17025, ENAC).
3. How to Verify the Authenticity of a COA? This is where it becomes crucial to know How to Read a Cannabinoid Certificate of Analysis (COA).
- Look for the laboratory seal and verify its reputation.
- Confirm that the lot ID matches the product ID.
- Use the QR (if available) to access the original report on the lab’s website.
⚠️ Signs of fraud:
- Fuzzy or editable data (e.g., unprotected PDF).
- Perfect” results with no margin of error.
- Unknown or unaccredited laboratory.
4. Frequently Asked Questions
âť“ Does a high CBD COA guarantee quality?
No. It may have contaminants. Always check all sections.
âť“ Why do some COAs show no contaminants?
Some labs only analyze cannabinoids. Requires a complete COA.
âť“ Is a product with 0.4% THC legal?
Depends on the country:
“A COA is your best ally to avoid scams and ensure effective and safe products.”
Need to analyze your product or understand a report? Learn more about How to Read a Cannabinoid Certificate of Analysis (COA) with NATURIS LAB we help you with:
- Full certificates (cannabinoids + contaminants).
- Regulatory advice.
- Verification of third party COAs.