How to Read a Cannabis Lab Report: COA Guide | Natural Buds
Author : Natural Buds | Published On : 26 Aug 2026
Introduction
Buying a cannabis or hemp-derived product involves more than looking at the product name, appearance, or advertised potency. A laboratory report can provide important information about what was actually found in a tested product.
These reports are commonly called Certificates of Analysis (COAs). They can show cannabinoid levels, terpene information, and whether a product was tested for certain contaminants.
For shoppers who are unfamiliar with laboratory testing, a COA can look complicated at first. Once you know what each section means, however, it becomes much easier to understand the information and compare products more carefully.
In this guide, we will explain how to read a cannabis lab report, what information to look for, and why third-party testing matters.
What Is a Cannabis Lab Report?
A cannabis lab report is a document produced after a laboratory analyzes a product.
Depending on the product and testing laboratory, the report may contain information about:
- Cannabinoid concentrations
- THCa and Delta-9 THC
- CBD and other cannabinoids
- Terpenes
- Heavy metals
- Pesticides
- Microbial contamination
- Residual solvents
- Moisture or water activity
- Product identification
- Testing dates
The exact information included can vary depending on the product and laboratory.
What Is a Certificate of Analysis?
A Certificate of Analysis, commonly called a COA, is the laboratory document that reports the results of product testing.
When reviewing a COA, start by confirming that the report actually corresponds to the product you are considering.
Look for identifying information such as:
- Product name
- Batch or lot number
- Sample identification
- Testing laboratory
- Date received
- Date tested
- Report number
If the product packaging contains a batch number, compare it with the batch number shown on the laboratory report.
How Do You Read the Cannabinoid Results?
The cannabinoid section is one of the most important parts of a COA.
It may list cannabinoids such as:
- THCa
- Delta-9 THC
- CBD
- CBDA
- CBG
- CBC
- Other minor cannabinoids
The report may show the amount of each cannabinoid as a percentage or concentration.
Why Does THCa Matter?
THCa is the acidic precursor to THC. In its raw form, it is different from Delta-9 THC, but heating can convert THCa into THC.
This is why shoppers should avoid looking at a single number without understanding which cannabinoid the number represents.
A laboratory report can provide a more detailed picture of the cannabinoid profile than a product label alone.
What Does Total THC Mean?
Some COAs provide a calculated total THC value.
The calculation can account for the potential conversion of THCa into Delta-9 THC.
Because laboratory reports may use different terminology and calculation methods, always review the specific definitions and notes provided by the testing laboratory rather than assuming that every report uses identical calculations.
What Are Terpenes on a Lab Report?
Terpenes are naturally occurring compounds associated with the aroma and flavor characteristics of many plants.
In cannabis products, a terpene section may identify compounds such as:
- Myrcene
- Limonene
- Caryophyllene
- Linalool
- Pinene
- Humulene
A terpene profile can help explain why two products with similar cannabinoid percentages may have noticeably different aromas and flavors.
However, terpene percentages should not be treated as a guarantee of a specific experience.
Why Should You Check Contaminant Testing?
Potency is only one part of product testing.
A more complete laboratory report may also include testing for unwanted substances such as:
Heavy Metals
Testing may check for substances such as lead, arsenic, cadmium, and mercury.
Pesticides
Pesticide testing helps identify whether specified pesticide compounds were detected above applicable testing thresholds.
Microbial Contaminants
Depending on the product and testing requirements, laboratories may test for certain bacteria, yeast, mold, or other microbial contaminants.
Residual Solvents
Products that involve extraction may be tested for residual solvents.
These sections can provide additional information about product quality and testing.
How Do You Know If a COA Is Current?
Check the testing date and batch information.
A laboratory report from an older batch does not necessarily represent a newer product.
When possible, match:
Product → Batch Number → COA → Testing Date
This simple process can help you make sure the report you are reading actually belongs to the product in front of you.
What Does “Pass” Mean on a Lab Report?
A COA may use terms such as:
- Pass
- Fail
- ND
- Not Detected
- Below Limit of Quantification
These terms can have specific meanings based on the laboratory's testing methodology.
ND, for example, generally means that the tested substance was not detected at or above the laboratory's reporting threshold. It does not necessarily mean that absolutely zero molecules are present.
Always review the laboratory's definitions and reporting limits when interpreting these results.
What Is a Third Party Lab?
A third-party laboratory is an independent testing organization that analyzes a product rather than simply relying on the product manufacturer to report its own results.
Third-party testing can provide an additional layer of transparency.
Natural Buds highlights independent laboratory testing and provides access to product lab information for shoppers who want to review testing details.
5 Things to Check Before Buying
Before purchasing a product, take a few moments to review its available laboratory information.
1. Check the Batch Number
Make sure the batch number on the product matches the laboratory report.
2. Check the Testing Date
Look at when the sample was tested.
3. Review Cannabinoid Results
Look beyond a single advertised potency number and review the complete cannabinoid profile.
4. Review Contaminant Results
Check whether the report includes relevant safety testing.
5. Verify the Laboratory
Look at the name of the laboratory and the information provided on the report.
Why Lab Testing Matters for Product Selection
Laboratory testing gives shoppers additional information before making a purchasing decision.
Instead of relying entirely on marketing claims, customers can examine available testing data and better understand the product's reported cannabinoid profile and testing results.
This is especially useful when comparing products with similar names or advertised potency.
How Natural Buds Approaches Product Transparency
Natural Buds emphasizes lab-verified products and transparency as part of its product-selection approach. The website states that its products undergo independent testing and directs shoppers toward laboratory information.
For customers in Fort Worth who want to understand what they are purchasing, learning how to interpret a COA can make product research much easier.
Frequently Asked Questions
What does COA stand for?
COA stands for Certificate of Analysis. It is a laboratory document containing testing results for a specific product or batch.
What should I look for first on a cannabis lab report?
Start with the product name, batch number, testing date, laboratory information, cannabinoid results, and available contaminant testing.
Does a higher THC percentage mean a better product?
Not necessarily. Potency is only one characteristic of a product. Cannabinoid profile, terpene profile, testing information, freshness, and individual preferences can also matter.
What does ND mean on a COA?
ND generally means “Not Detected” at or above the laboratory's specified reporting threshold.
Why should the batch number match the COA?
Matching the batch number helps confirm that the laboratory report corresponds to the product you are considering rather than a different production batch.
Conclusion
Understanding a cannabis lab report does not have to be complicated. Start with the product and batch information, review the cannabinoid profile, check the testing date, and examine available contaminant results.
A COA can give shoppers useful information that goes beyond a product name or marketing claim. By learning how to read these reports, you can make more informed comparisons and better understand the products you are considering.
For Natural Buds customers, laboratory information is an important part of the product research process.
