Certificates of Analysis, or COAs, are an essential part of the cannabis industry, whereby a detailed analysis of the composition and safety of a cannabis product is performed. Third-party labs issue these certificates to show consumers, retailers, and producers the potency, purity, and safety of the products they purchase or sell. Understanding Cannabis Certificates of Analysis is essential in informed decision-making, quality assurance, and regulatory compliance. In this blog, we will take you through the critical aspects of COAs and what to look for when reviewing them.
Understanding Cannabis Certificates of Analysis: A Key Component in Cannabis Quality

A COA in Cannabis is a document provided by an accredited laboratory that confirms the cannabinoid and terpene content, contaminants, and other characteristics of a cannabis product. These certificates are essential to both consumers and producers in ensuring the cannabis product is safe, potent, and free from harmful substances. The COA proves that the product has been tested to meet safety standards and is consistent with its claims.
If you walk into any cannabis dispensary to purchase flower, concentrates, or edibles, the COA will give vital information about what is inside that product. It details levels of cannabinoids such as THC, CBD, and others, with test results for contaminants to ensure the product is safe to consume. This kind of transparency is vital in a growing market preoccupied with consistency and safety.
The Role of Terpene Profiles in Cannabis COAs
Terpenes are a class of aromatic compounds found in Cannabis responsible for the plant’s unique aroma, flavour, and therapeutic effects. Generally speaking, a Cannabis Certificate of Analysis will include a comprehensive terpene profile and cannabinoids. A terpene profile contains valuable information on which specific terpenes a product contains and at what concentrations. Limonene, myrcene, and pinene are some of the most important terpenes, basically governing the overall effects and experiences a cannabis consumer is trying to achieve.
By looking at the COA’s terpene profile, one can choose a more fitting cannabis product based on preference and desired effect. For example, the prevalence of myrcene in high concentrations may suggest an overall soothing and relaxing effect, while limonene may provide uplifting and energizing effects. Understanding these nuances can help consumers select the right strain or product to suit their needs, whether for relaxation, focus, or pain-related issues.
THC and CBD Levels: Why They Matter in Cannabis Testing

The main component of any Cannabis Certificate of Analysis includes cannabinoid analysis: those of THC and CBD. THC is also known as tetrahydrocannabinol, and it’s the primary psychoactive ingredient in Cannabis. It is responsible for the “high” experienced by users. CBD, on the other hand, is called cannabidiol and is non-psychoactive, generally desired for its possible medicinal applications: pain reliever, anxiolytic, and anti-inflammatory, among others.
First, when going through a COA, the THC and CBD levels need to be checked against what the product manufacturer has claimed. The COA will give an exact percentage of each cannabinoid present in the product to help you understand how potent it is. If you are looking for a mild experience, a product with lower THC levels and higher CBD levels may be ideal. Those looking for the heavy-hitting effects may opt for a product boasting high levels of THC.
Pesticide Testing and Safety: What a Cannabis Certificates of Analysis Tells You
Pesticide testing is essential for cannabis safety, as pesticides can be dangerous to human health upon consumption. While the cannabis plant is highly susceptible to pests and diseases, its treatment with pesticides involves certain risks that must be minimized through proper testing. In most regulated markets, pesticide testing must be conducted to ensure Cannabis is free from harmful chemicals and contaminants.
A Cannabis Certificate of Analysis will explicitly state the results of pesticide testing, including the presence of pesticides or fungicides. Responsible cannabis brands will have COAs displaying “ND” next to pesticide categories, meaning those harmful products are not present in their products. If a product turns up positive for pesticide contamination, it could be considered unsafe for consumption and be pulled from the shelves. Therefore, always check the COA for pesticide results to ensure that the product you are considering is safe and meets industry standards.
What Is Heavy Metal Testing and Why It’s Crucial for Cannabis Consumers

Contaminated Cannabis with heavy metals has grown. Humans can be harmed through metal poisonings like lead, arsenic, cadmium, and mercury in cannabis plants that come out from the soil, water, or air. So now it becomes essential to ascertain complete freedom from harmful heavy metals in the produce given the increased intake of Cannabis.
Heavy metal testing results are among those provided on a Cannabis Certificate of Analysis, which will show if any toxic metals are within the product. When a product passes this test, it is free from harmful levels of heavy metals and thus safe for consumption. For consumers, the assurance of heavy metal testing on the COA is that they are not exposing themselves to dangerous substances while consuming cannabis products.
The Importance of Microbial Testing in Cannabis Products
The second most crucial testing of Cannabis is microbial testing. It involves testing the products for harmful bacteria, fungi, and moulds that could seriously affect health. Contaminants like E. coli, Salmonella, and Aspergillus mould are dangerous and can lead to illness, especially for individuals with weakened immune systems.
A Certificate of Analysis relating to Cannabis will indicate the microbial test results, specifically whether harmful microbes were in the product. In most cases, “ND” will be written next to those respective microorganisms, which means it has not been detected for contamination. Microbial testing for cannabis-infused edibles and extracts/concentrates is essential since both are more susceptible to product contamination during manufacturing.
How to Read a Cannabis Certificates of Analysis: A Step-by-Step Guide for Beginners
To the untrained, reading a Cannabis Certificate of Analysis might be daunting, considering all the technical information one must wade through. However, the essential details can be deciphered with a bit of guidance.
Start by looking at the cannabinoid profile, which will include the levels of THC and CBD. Then, move on to the terpene profile, listing types and concentrations of terpenes. After that, the safety tests will be reviewed, including pesticide, heavy metal, and microbial testing. Finally, check for lab accreditation and test methods to ensure this COA is not a joke. By following these steps, one would have confidently analyzed the quality and safety of a cannabis product.
Why COAs Matter for Consistent Products

Consistency is an issue in the cannabis industry, where consumers are reliant on some predictability when it comes to using Cannabis. The importance of product consistency through tests that ensure quality and potency consistently makes Cannabis Certificates of Analysis necessary. These give the detailed test results required for comparison among consumers who must confirm whether these products meet their expectations.
For producers, COAs help ensure that products are created with consistent quality. If a batch of cannabis tests differently than previous batches, producers can adjust their processes to maintain the desired cannabinoid and terpene profiles. COAs are essential tools in maintaining consistency within the cannabis market and ensuring that consumers can rely on the products they purchase. The Impact of COA Testing on
Cannabis Dosage and Effectiveness
Cannabis products range in potency, and without the proper information, one could find it quite a task. COAs give very accurate cannabinoid content in any given product, and that is a basis for proper dosing. Whether for pain, relaxation, or sleep-inducing effects, one needs to administer a certain dosage and, therefore, should know the right THC and CBD.
Without COAs, consumers must take the manufacturer’s word for what is true. COAs help ensure that dosing is consistent and predictable, making Cannabis a safer and more effective treatment for whatever health condition one may be trying to address.
Lab Accreditation: How to Verify Reliable Cannabis Testing
Not all cannabis testing laboratories are created equal, and the credibility of the COA depends on the lab’s accreditation. An accredited lab follows strict industry standards and ensures the testing methodologies are sound and trustworthy. COAs obtained from accredited labs are considered more legitimate and reliable than their non-accredited counterparts.
When reviewing a Cannabis Certificate of Analysis, always check for lab accreditation. Look for certifications from recognized organizations, such as ISO/IEC 17025, ensuring the lab has met rigorous standards for testing cannabis products. An accredited lab guarantees that the product has been tested accurately and thoroughly.
Understanding the Variability in COA Results Across Different Strains
The cannabinoid and terpene profiles can vary greatly, even within the same batch or cultivar. This variation may affect product potency, flavour, and active effects. Cannabis Certificates of Analysis help consumers understand this variability through their specific test results for each strain or batch.
When you go to purchase Cannabis, you want to look at the COA to know what, exactly, is in the strain you’re interested in. If you’re looking for specific effects, such as relaxation or pain relief, you’ll want to choose a strain with the appropriate cannabinoid and terpene levels. Understanding the COA will help you select a strain that aligns with your preferences and needs.
What are the Common Red Flags on a Cannabis Certificate of Analysis?
A COA is essential for quality assurance, but it can raise red flags when test results show inconsistency. Other red flags include incompleteness or missing test results, discrepancies in the labelled versus tested cannabinoid levels, or contamination with pesticides, heavy metals, or microbes.
If you encounter a COA with red flags, you should know it calls for caution. Inconsistent or incomplete results could indicate that the product has yet to undergo proper testing or safety. Ensure the COA is from a reputable lab and the results match the product claims.

