Beyond “Our Methods Are Validated”: How to Choose a Reliable Cannabis Testing Lab

“Our methods are validated.” Most licence holders have heard that from a testing lab. That is the minimum requirement for release testing of Cannabis to the Canadian market. 

On September 15, 2026, Health Canada published guidance on validating analytical methods in cannabis testing. It supplements ICH Q2(R2), is written specifically for cannabis, and is aimed at cultivation, processing and analytical testing licence holders. The requirement to use validated methods is not new. What the guidance does is describe, in some detail, what a well-validated method looks like: validated for each type of product it will be used on, checked through routine quality control, and reported transparently.

For licensed producers evaluating a new testing partner or reviewing their existing laboratory, here are five key steps to consider while making a decision.

Step 1: Identify Your Cannabis Testing Requirements

Before comparing laboratories, start by defining what your products actually require.

Testing requirements can vary depending on the product type, target analytes, applicable regulations, and intended market. A laboratory that routinely analyzes dried cannabis may not necessarily have suitable methods for concentrated extracts, beverages, or complex edibles like infused chocolate or gummies.

Consider the following:

• Product types: Dried flower, extracts/oils, edibles, beverages, and topicals.
• Required analyses: Cannabinoid potency, terpenes, pesticides, heavy metals, microbial contaminants, residual solvents, and other applicable tests.
• Regulatory requirements: Canadian compliance testing, medical or pharmaceutical applications, and relevant export-market requirements.
• Operational needs: Expected sample volumes, turnaround times, and future product development.

Identifying these requirements early helps ensure that your selected laboratory can support both current testing needs and future product expansions.

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Step 2: Laboratory Accreditation and License

Laboratory credentials are among the most important indicators to review. 

Not all licences and accreditations demonstrate the same capabilities and there is a difference between holding a licence to perform a specific test and accreditation performing a specific test.

Licensing and accreditation serve different purposes. A regulatory licence authorizes a laboratory to conduct specific activities under applicable legislation, while accreditation provides independent recognition of its technical competence to perform defined testing activities. Understanding this distinction helps producers evaluate a laboratory’s qualifications beyond the certificates it holds.

Health Canada Analytical Testing License

A Health Canada Cannabis Analytical Testing License authorizes a laboratory to conduct specified cannabis testing activities under the Cannabis Act and Cannabis Regulations.

This is the legal foundation for third-party cannabis analytical testing in Canada. However, the licence itself does not address the technical capabilities of that laboratory nor the level of skill in performing certain analyses.

ISO/IEC 17025 Accreditation: Check the Scope, Not Just the Certificate

ISO/IEC 17025 is an internationally recognized standard for laboratory technical competence. It evaluates important aspects of laboratory operations, including personnel, equipment, testing methods, measurement traceability, and quality management.

However, ISO/IEC 17025 accreditation does not automatically cover every test the laboratory offers.

For example, the laboratory may be accredited for environmental testing of water and soil. The laboratory is certainly an ISO/IEC 17025 accredited laboratory; however, this has no bearing on any cannabis testing, including cannabinoid potency or contaminant analysis, outside of the laboratory meeting ISO/IEC 17025 standards for general laboratory operation and data integrity. 

This is why it is essential to review the laboratory’s scope of accreditation, which identifies the specific testing activities, methods, and sample matrices covered.

At PPB Analytical, we hold ISO/IEC 17025:2017 accreditation through one of the authorized third-party, Canadian Association for Laboratory Accreditation (CALA), covering cannabis and environmental testing activities for a variety of sample matrixes.

GMP and Drug Establishment Licence (DEL)

For certain pharmaceutical applications and regulated supply chains, Good Manufacturing Practices (GMP) and Drug Establishment Licensing (DEL) may also be important considerations.

A Health Canada DEL authorizes specified drug-related activities under applicable pharmaceutical regulations. GMP requirements address broader quality-system controls, including documentation, traceability, deviation management, and data integrity.

While these qualifications are not universally required for routine cannabis testing, they can be particularly relevant to producers with specialized pharmaceutical testing needs.

In addition to our cannabis analytical testing licence and ISO/IEC 17025 accreditation, PPB Analytical holds a GMP/DEL for specified drug-testing activities, supporting our capabilities within a regulated medical-use cannabis quality framework.

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Step 3: Confirm That Analytical Methods Are Validated for Your Products

A laboratory may offer a broad range of testing services, but the reliability of its results ultimately depends on whether its analytical methods are suitable for the products being tested.

Cannabis products have diverse and often complex chemical compositions. Differences between matrices can influence sample preparation, extraction efficiency, and instrument performance. These influences are known as matrix effects.

For example, a potency method developed and validated for dried cannabis may not be suitable for a cannabis-infused beverage. Validation studies would be required to determine if the dried cannabis method is suitable for a cannabis-infused beverage. In fact, the method will need to be modified (we know because we’ve done this and have the validation reports to support the claim.)

Health Canada’s September 2026 guidance emphasizes the importance of considering the intended product type and the complete analytical workflow during method validation.

Reliable methods should demonstrate appropriate:

• Accuracy and precision: Producing results that are accurate and consistent.
• Specificity and selectivity: Distinguishing target analytes from other compounds in the sample.
• Sensitivity and working range: Reliably measuring analytes at concentrations relevant to the product.
• Robustness: Maintaining performance under expected variations in testing conditions, such as having different analysts perform the same method

So, a method described as validated is only meaningful when it is fit for the intended sample matrix.

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Step 4: Quality Control and Reporting Results

Method validation establishes that an analytical procedure can perform as intended. However, reliable laboratories must also demonstrate that their methods continue to perform consistently during routine testing.

Health Canada’s guidance describes routine quality control as a form of continuing validation.

A quality-focused laboratory should maintain documented procedures for instrument calibration, reference materials, quality control samples, performance monitoring, and investigation of results that fall outside established acceptance criteria.

These practices help laboratories identify analytical problems before potentially unreliable results are reported.

Look Beyond the Numbers on a Certificate of Analysis (COA)

A reliable COA should present analytical results clearly and provide enough information to support their interpretation.

When reviewing a COA, pay attention to how results are presented, including the reporting units, applicable detection and quantification limits (LOD/LOQ), and any calculated values. These details help determine whether compounds can be reliably detected and measured at relevant concentrations and whether the reported results are meaningful for your product.

Equally important is how the laboratory responds when unexpected results arise. A dependable testing partner should be able to explain potential analytical discrepancies, review relevant quality control data, and investigate concerns using documented procedures.

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Step 5: Assess the Laboratory’s Service and Long-Term Support

Beyond above, a reliable cannabis testing laboratory should support your operational needs with consistent turnaround times, clear communication, and responsive technical assistance.

Consider whether the laboratory can accommodate your testing volume, support different product formats, investigate unexpected results, and adapt to your evolving requirements.

At PPB Analytical, we understand the importance of timely testing results in keeping your operations on schedule. To accommodate different testing needs, we offer four service levels:

• Standard: 5 business days
• Rush: 3 business days
• Urgent: 24–48 hours
• Same-Day: Results within the same day

Please note: Turnaround times vary depending on the test type and sample requirements. Certain analyses, including some microbiological tests, require a minimum of three days and may not qualify for expedited services.


Our team is committed to delivering accurate, reliable results within agreed timelines, helping you minimize delays and maintain efficient operations.

A dependable testing partner provides the expertise and support needed to keep your quality assurance operations running smoothly. Our Health Canada Cannabis Analytical Testing Licence, ISO/IEC 17025 accreditation for cannabis and environmental testing, and GMP/DEL capabilities reflect our commitment to technical competence and laboratory quality.