Understanding CBD Certificate of Analysis (COA): A Pet Owner’s Guide
When you buy a CBD product for your pet, you are placing a tremendous amount of trust in the brand behind that bottle. You are trusting that what is on the label is actually in the product. You are trusting that it does not contain harmful contaminants. You are trusting that it is safe to give to a member of your family.
But trust alone is not enough. The CBD industry for pets remains largely unregulated, and independent analyses have repeatedly found products that contain significantly more or less CBD than claimed, residual pesticides, heavy metals, and in some cases, dangerous levels of THC.
This is where the Certificate of Analysis, commonly called a COA, becomes your most important tool as a consumer. A COA is an independent, third-party laboratory report that verifies exactly what is in a CBD product. Knowing how to read one, and knowing what red flags to watch for, can mean the difference between a safe, effective product and one that could harm your pet.
What Is a Certificate of Analysis?
A Certificate of Analysis is a document produced by an independent, accredited laboratory after testing a sample of a CBD product. The manufacturer sends a sample of each batch to the lab, and the lab runs a series of tests to verify the product’s contents and safety.
A comprehensive COA typically includes several categories of testing: cannabinoid potency analysis, contaminant screening (including pesticides, heavy metals, microbial organisms, and residual solvents), and sometimes terpene profiling. Each section tells you something important about the quality and safety of the product you are considering for your pet.
The key word in all of this is “independent.” The lab performing the tests should have no financial relationship with the CBD company. This is what makes it third-party testing. A lab report generated by the manufacturer’s own in-house laboratory is not a true COA and should not be treated as one.
Why COAs Matter Especially for Pet Products
Your dog or cat cannot tell you if something tastes off, if a product is making them feel unwell, or if they are experiencing subtle side effects. They depend entirely on you to ensure what goes into their body is safe.
A 2020 study published in the Journal of AOAC International found that nearly 50% of CBD products tested did not match their label claims for CBD content. Some contained as little as half the advertised amount, while others contained significantly more. For pet products, where precise dosing matters and pets are typically much smaller and more sensitive than adult humans, this kind of inconsistency is unacceptable.
Furthermore, hemp is a bioaccumulator, meaning it absorbs substances from the soil it grows in. If hemp is grown in contaminated soil or treated with pesticides, those contaminants end up in the final product. Without COA verification, there is no way to know whether a CBD oil contains harmful levels of lead, arsenic, mercury, or pesticide residues.
How to Read a CBD Certificate of Analysis
A COA can look intimidating at first glance. It is typically a multi-page document filled with scientific terminology, numbers, and abbreviations. But once you know what each section means, it becomes straightforward to evaluate.
Section 1: Product Information and Sample Details
The top of a COA should clearly identify the product being tested. Look for the product name, the batch or lot number, the date the sample was received by the lab, and the date the analysis was completed.
The batch number is important because it allows you to match the COA to your specific bottle. A reputable company will print a batch number on each product and provide the corresponding COA. If a company provides only a single, generic COA without batch-specific testing, that is a concern.
You should also see the name and accreditation details of the testing laboratory. Look for ISO 17025 accreditation, which is the international standard for testing and calibration laboratories. This accreditation means the lab follows rigorous quality management standards and has been audited by an independent accreditation body.
Section 2: Cannabinoid Potency Analysis
This is the section most people focus on first, and it tells you how much CBD (and other cannabinoids) the product actually contains. You will typically see a table listing individual cannabinoids with their concentrations.
Key cannabinoids to look for include:
- CBD (Cannabidiol): The primary therapeutic compound. The total CBD listed should closely match the amount on the product label. Industry standards generally accept a variance of plus or minus 10%, though closer to the labeled amount is always better.
- THC (Delta-9-Tetrahydrocannabinol): The psychoactive compound. For legal hemp-derived products, total THC must be below 0.3%. For pet products, lower is generally better. The COA should confirm the THC level is within legal limits.
- CBG (Cannabigerol), CBN (Cannabinol), CBC (Cannabichromene): These are minor cannabinoids present in full-spectrum products. Their presence confirms the product is genuinely full-spectrum and contributes to the entourage effect.
- CBDA and THCA: These are the acidic precursors to CBD and THC. Some will be present in less processed products. Total CBD is typically calculated as CBD + (CBDA x 0.877).
Compare the total CBD on the COA to what the label claims. If the label says 1200mg and the COA shows 900mg, the product is underdosed by 25%. If the label says 600mg and the COA shows 800mg, you cannot dose accurately because the product does not match its own label.
Section 3: Heavy Metals Testing
Heavy metals testing checks for the presence of lead, mercury, arsenic, and cadmium. These are the “big four” heavy metals that pose the greatest health risks, particularly with chronic exposure.
Results will be listed in parts per billion (ppb) or parts per million (ppm), along with the acceptable limit. You want to see results that either say “ND” (Not Detected) or fall well below the established limits. Even trace amounts within acceptable limits are generally safe, but products consistently showing ND are preferable for daily use with pets.
Section 4: Pesticide Screening
A thorough pesticide panel screens for dozens of individual pesticides, including organophosphates, pyrethroids, fungicides, and herbicides. Each pesticide will have its own detection limit and acceptable threshold.
Ideally, you want to see “ND” across the board for all pesticides. This is especially important for USDA Organic certified products, which should not contain any detectable synthetic pesticide residues. If a product claims to be organic but its COA shows pesticide detections, something is wrong.
Section 5: Residual Solvents
CBD is extracted from hemp using various methods, and some methods involve chemical solvents like butane, propane, ethanol, or hexane. Residual solvent testing ensures that no harmful amounts of these chemicals remain in the final product.
CO2 extraction, which is the gold standard for purity, should produce products with no detectable residual solvents. If a COA shows detectable solvent residues, it may indicate the use of cheaper extraction methods or inadequate post-processing.
Section 6: Microbial Testing
This section screens for harmful microorganisms including E. coli, Salmonella, mold, and yeast. These contaminants can arise from poor manufacturing conditions, inadequate storage, or contaminated raw materials.
Results should indicate that all microbial tests are within acceptable limits or show no detections. This is particularly important for pet products that will be administered orally, as ingested pathogens can cause serious gastrointestinal illness.
Section 7: Terpene Profile (If Included)
Not all COAs include terpene profiling, but it is a nice addition. Terpenes are aromatic compounds found naturally in hemp that contribute to the entourage effect. Common terpenes include myrcene, limonene, linalool, and beta-caryophyllene, each of which has its own potential therapeutic properties.
A terpene profile confirms that a full-spectrum product genuinely retains the natural plant compounds that differentiate it from a CBD isolate. It also provides additional insight into the quality of the extraction process.
Red Flags to Watch For
Knowing what a good COA looks like also means knowing when something is wrong. Here are the most important red flags that should make you reconsider a CBD product.
No COA Available
If a CBD company does not provide COAs for their products, that is the single biggest red flag. There is no legitimate reason for a quality CBD manufacturer to withhold lab testing results. Walk away from any brand that cannot produce current, batch-specific COAs.
In-House Testing Only
A COA generated by the manufacturer’s own lab, or by a lab that is owned by or financially connected to the manufacturer, is not independent verification. Always look for the name of a clearly independent, ISO 17025 accredited third-party lab.
Significant Potency Discrepancies
If the CBD content on the COA deviates by more than 10% from the label claim, the product is either underdosed or overdosed. Either scenario is problematic. An underdosed product means you are not getting what you paid for and cannot dose your pet accurately. An overdosed product introduces unpredictability.
Detectable Contaminants
While trace amounts of heavy metals or solvents within established limits may be technically acceptable, the best products consistently show no detectable contaminants. For a product you are giving to your pet daily, opt for the cleanest option available.
Old or Undated COAs
A COA without a date, or one that is more than 12 months old, may not reflect the current product formulation or manufacturing quality. COAs should be recent and batch-specific.
Missing Test Categories
A COA that only shows potency without contaminant testing is incomplete. A complete COA should include, at minimum, cannabinoid potency, heavy metals, pesticides, and microbial testing. Residual solvents and terpene profiling are valuable additions.
Suspiciously Perfect Results
While clean results are what you want, a COA where every single value reads exactly zero across all categories, with no variation whatsoever, can sometimes indicate fabricated results. Genuine laboratory analysis typically shows at least some variance in measurements, even when results are well within safe limits.
How ABSC Organics Approaches Transparency
At ABSC Organics, every batch of our CBD oil is tested by an independent, ISO 17025 accredited laboratory. We publish our Certificates of Analysis publicly on our website so any customer or prospective customer can review them before making a purchase.
Our COAs verify cannabinoid potency that matches our label claims, THC levels well below the 0.3% federal limit, no detectable pesticides, heavy metals below detection limits, and no residual solvents. You can view our testing results directly on our Certificate of Analysis page.
This transparency is not just good business practice. It is a reflection of the same commitment to scientific rigor that led us to invest in three clinical trials at Colorado State University. We believe that pet owners deserve verifiable evidence, not marketing claims, when it comes to the products they give their animals.
To learn more about the research behind our products, visit our clinical research page.
How to Access and Verify a COA
Here is a practical step-by-step process for checking a COA before you buy a pet CBD product:
- Locate the COA: Check the company’s website for a lab results or COA page. If you cannot find it easily, contact customer service and ask for the COA for the specific product and batch you are considering.
- Match the batch number: Compare the batch number on the COA with the batch number printed on the product packaging. They should match.
- Verify the lab: Note the name of the testing laboratory. Search for that lab online and confirm it is ISO 17025 accredited and operates independently from the CBD company.
- Check potency: Compare the total CBD on the COA to the label claim. It should be within 10% of the stated amount.
- Review contaminants: Look at heavy metals, pesticides, residual solvents, and microbial results. All should be within safe limits, with ND (Not Detected) being ideal.
- Check the date: Ensure the COA is recent and corresponds to a batch that would currently be on shelves.
Questions to Ask CBD Companies About Their Testing
If you are evaluating a new CBD brand for your pet, here are questions that a reputable company should be able to answer clearly and without hesitation:
- Do you test every batch, or only periodic samples?
- Which independent laboratory performs your testing?
- Can you provide a COA for the specific batch of the product I am purchasing?
- What panels are included in your testing? (potency, pesticides, heavy metals, solvents, microbials)
- Are your COAs available on your website without needing to request them?
- Has your product been used in any published clinical research?
Any hesitation, vagueness, or refusal to answer these questions should be a significant concern.
The Connection Between COAs and Clinical Research
A COA verifies what is in a product at a specific point in time. Clinical research goes further by testing whether a verified product actually works as claimed in real animals under controlled conditions.
ABSC Organics is one of the very few pet CBD brands that has both comprehensive COAs and clinical trial data from a major veterinary research institution. Our three CSU trials were conducted using the same product you purchase from our website, tested to the same standards documented in our COAs.
This combination of batch-level quality verification and clinical efficacy data provides a level of confidence that no amount of marketing or testimonials can replicate.
Frequently Asked Questions
What does “ND” mean on a COA?
ND stands for “Not Detected,” meaning the substance was not found at or above the laboratory’s detection limit. This is the best possible result for contaminant testing panels.
What is the difference between LOD and LOQ?
LOD (Limit of Detection) is the lowest concentration of a substance that the lab can reliably identify as present. LOQ (Limit of Quantification) is the lowest concentration that can be measured accurately. A result between LOD and LOQ means the substance was detected but not in a high enough quantity to measure precisely.
How often should a CBD company test their products?
Reputable companies test every production batch. At minimum, testing should occur with every new batch of raw hemp extract and every finished product lot. Periodic or annual testing is not adequate for ongoing quality assurance.
Can I verify a COA directly with the laboratory?
Yes. Most accredited labs will confirm the authenticity of a COA if you contact them with the sample ID or report number. This is a good step to take if you have any doubts about a COA’s legitimacy.
Protect Your Pet With Informed Choices
Understanding how to read a Certificate of Analysis is one of the most practical skills a pet CBD consumer can develop. It transforms you from a passive buyer relying on label claims into an informed decision-maker who can verify product quality independently.
When you choose a CBD product for your dog or cat, demand transparency. Look for batch-specific, third-party COAs that cover potency, pesticides, heavy metals, solvents, and microbials. And consider whether the brand behind the product has invested in the kind of clinical research that demonstrates real commitment to your pet’s well-being.
See transparency in action. View ABSC Organics’ Certificates of Analysis and explore our clinical research to understand why informed pet owners trust ABSC.
