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Why Independent Third-Party Cannabis Testing Is Important

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Cannabis Testing
PHOTO | HQUALITY
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During cultivation, the cannabis plant acts like a sponge. It absorbs everything it is exposed to, from pesticides, nutrients, and heavy metals present in the soil. For these reasons, it is essential that reputable and reliable third-party labs carry out cannabis testing to assure safety and efficacy of the product.

Lab testing of cannabis products is an essential part of the regulated market’s supply chain. It detects offensive chemicals or contaminants that can lead to adverse health effects when consumed, while additionally providing cultivators and retailers with efficacious cannabinoid and terpene profiles of legal cannabis products. 

In Canada’s regulated market, batch release quality control testing is required for potency and product safety, so it is necessary to measure substances like pesticides, mycotoxins, bacteria, and molds. Unfortunately, reports on potency and contaminants can vary from lab to lab, while recalls of contaminated products threaten consumer trust of legal products. 

Sigma Analytical Services is a full-service pesticide, elemental, molecular, genetic, and pathogen analysis laboratory for cannabis, hemp, and cannabis-derived products. It delivers reliable science for cannabis products to the cannabis industry and cannabis consumers.

Cannabis Aficionado spoke with Ashton Abrahams, co-founder and COO of Sigma Analytical Services, to learn more about the importance of cannabis testing and Sigma’s strict processes.

Cannabis Aficionado: Tell me about your entrepreneurial journey to cannabis.

I’m a serial entrepreneur with over 20 years of experience in starting and growing several successful ventures. In 2017, when Canada was in the process of legalizing cannabis, my partner and I saw an opportunity to focus on a different side of the new cannabis industry — ancillary testing and quality reassurance requirements. We knew there would be new products in the market, and they would all require testing. So, we started a testing lab that focused on cannabis and cannabis products, and this is how Sigma started.

What sets Sigma apart from other testing labs?

We want to ensure products available in this new market are efficacious and safe, and ensure the levels of both remain consistent. Sigma is the only GMP (Good Manufacturing Practice) certified, cannabis-focused lab in Canada and the only cannabis-focused lab with cross-continental operations. We developed and validated our methods back in 2018 and 2019, so we are the frontrunner in Cannabis 2.0 product testing and are set up to test a comprehensive list of cannabis products — including flower, edibles, beverages, and topicals. 

Sigma also has validated methods for quantifying and testing 16 cannabinoids and 43 terpenes — one of the highest in the market — and our analytical and microbiology tests are compliant with Health Canada, EU, and US Pharmacopeia.

Additionally, Sigma was awarded the Best Cannabis Lab/Testing Facility in Canada at the Grow Up 2019 awards.

Inside Sigma Analytical Services’ state-of-the-art lab.

What need does Sigma fill in the global cannabis industry?

Sigma brings reliable science that is already available in food and pharma to the cannabis industry, its products, and consumers.

Cannabis, food, and pharma share certain quality requirements. However, there is a big difference: in terms of quality assurance, food and pharma have decades of testing experience, while cannabis is a new industry, and the science is still being developed. 

What kind of samples do you test?

We have developed and validated testing methods for many different types of cannabis products, from traditional dried flower and oils to Cannabis 2.0 products , such as concentrates, beverages, edibles, and topicals. From a testing standpoint, each and every one of these products is different and can have a different matrix. In turn, we develop a testing  method for each one.

What should customers be looking for to see reassurance that a product’s been tested? 

Make sure their products are purchased through legal channels. It’s the regulatory bodies’ responsibility to make sure the products launched in the market are not just tested, but tested specifically by qualified labs.

Moldy cannabis is a problem in legal markets and there are numerous reports of Health Canada product recalls after customers discovered moldy flower. Can you talk to us about how you test for these pathogens?

From day one, instead of using the traditional culture-based method, Sigma has tested for mould and all microbial contamination using a newer technology called qPCR (quantitative Polymerase Chain Reaction). When we first started it in late 2018, nobody was familiar with it in the cannabis industry, so we had to take time to explain to our clients that it was a better, more reliable, and faster process. In the last six months, however, we have seen a huge shift in attitude. Not only have the cannabis producers accepted qPCR, but more cannabis labs are starting to use the technology to test for microbial contaminations.

Cannabis Testing
Moldy cannabis. PHOTO | LabRoots

What are some of the most exciting developments in cannabis testing?

Using qPCR for microbial contamination is very new for the cannabis industry. We’re happy and excited about it because we see the benefits and we hope the whole cannabis industry embraces it. 

Secondly, the challenges of formulating, developing, and testing new products. The developments in the past six months have been really promising.

Thirdly, discovering more about the cannabis plant and what ends up in cannabis products is really an exciting development. As we progress, we are sure to learn more about the effects of cannabinoids and terpenes.

What’s your pinnacle vision of cannabis testing?

There are two sides to it. There is a regulatory side, and there is the testing side. On the regulatory side, it’s about what needs to be tested, and how it needs to be tested. 

A very important part of the quality assurance initiative for cannabis is ensuring the testing sample is representative of that batch. There are different factors in place. Is that batch homogeneous or not? Are the characteristics consistent or not? Cannabis is a plant. It’s an agricultural product. It’s not something that’s coming out of a machine, so we cannot expect all of the plants to have exactly the same characteristics. I believe one key is to limit the size of the batch. Other jurisdictions have clearly defined regulations. For example, in California, it clearly states that each batch cannot be larger than fifty pounds. In the Canadian regulations, there is no definition at all.

Secondly, labs need to get more serious. Some labs are testing cannabis products with outdated instruments or unvalidated methods, meaning their results cannot be truly accurate or reliable. Cannabis labs cannot use a 15-year-old second-hand instrument and expect to get the same results as pharmaceutical labs that use the best, most advanced instruments. Some people might think that testing cannabis products is not as important as pharmaceutical products, but it is just as important.

Cannabis has a very complex matrix which requires complex testing methods. Not all labs have good enough or validated methods. However, I’m optimistic that it’s a matter of years, maybe between five to ten, for cannabis testing to get there.

How is Sigma helping to foster the growth of a responsible and safe legal cannabis industry?

I think everyone active in the cannabis industry has a responsibility to make sure they are doing a good job and providing safe and efficacious products to the consumer. That’s because, if the consumer is not happy with what they’re getting from us, it will translate into unhappiness with the whole legalized framework.

Finally, what’s next for Sigma?

We are going through some expansion at our headquarters in Toronto and we’re about to acquire a lab in British Columbia, which will be our second lab in Canada. Additionally, we have a joint venture in Colombia and are setting up the first GMP certified cannabis lab in South America.

We are also becoming more involved with helping develop formulations for new products, and testing them, especially for the producers that follow GMP requirements either in pursuit of higher quality or for international cannabis markets.

We also recently received our GMP clearance from the Australian Therapeutic Goods Administration (“TGA”). The approval designates Sigma as an approved testing laboratory for Canadian companies to introduce their products into the Australian cannabis market.

Cannabis

Rooted and ReLeaf Set October 30 Grand Opening in Eldersburg

The already-operating Liberty Road dispensary plans a Friday celebration, with a 1 p.m. ribbon cutting and a standing military discount.

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Small-town main street with American flags and parked vehicles

Rooted, a collaboration with ReLeaf Shop, will hold its Eldersburg grand opening on Friday, October 30, giving Carroll County customers a date to meet the people behind a store that is already operating. The event is a formal celebration, rather than the first day the dispensary begins serving shoppers.

In an October 27 announcement, the business scheduled opening remarks for 12:50 p.m. and a ribbon cutting for 1 p.m. at 1337 Liberty Road. The partnership brings together Rooted founder Andrae McEnnis, a 20-year military veteran, and ReLeaf Shop CEO Connor Whelton.

The organizers list barbecue from 11 a.m. to 2 p.m. and again from 4 to 7 p.m., a photo booth from 1 to 4 p.m., and a DJ from 4 to 7 p.m. Regular store hours are 9 a.m. to 10 p.m. daily. These are the business’s announced plans; visitors should confirm details before travelling.

A community event and a regulated store

A grand-opening program can make a dispensary feel like another neighborhood business. Purchasing cannabis still involves specific rules. The Maryland Cannabis Administration’s adult-use guidance says customers must be at least 21 and show valid government-issued photo identification at the point of sale.

The agency identifies licensed dispensaries as the legal place to buy cannabis in the state. It also separates adult-use purchasing from the medical program, which continues with accommodations intended to preserve patient access, including dedicated service lines or patient-only hours.

For visitors, the practical question is which service they need when they arrive. A ribbon cutting, an online order and a medical pickup are different reasons to visit, even when they share the same address. Checking the store’s current instructions avoids assuming the event program describes every part of the shopping process.

Maryland’s FAQ also prohibits smoking cannabis in public places and using it while driving. An event listing food and entertainment is not itself an invitation to consume on site. Planning transportation before using cannabis is part of making a visit workable, rather than something to decide after shopping.

The MCA also lists adult-use purchase limits by product form, including 1.5 ounces of flower, 12 grams of concentrates or 750 milligrams of THC in specified products. These are legal purchase amounts, not guidance about how much someone should consume.

Military discounts and medical status are separate

Rooted and ReLeaf say active-duty and retired military customers receive 25 percent off non-sale products every day. The announced offer is a standing store discount, not a one-day grand-opening promotion. Customers should check how the business verifies eligibility and which products qualify before assuming it applies to an entire order.

A veteran discount does not determine eligibility for Maryland’s medical cannabis program. The MCA’s patient guidance describes a separate registration process for Maryland residents whose providers recommend cannabis for qualifying conditions. It also allows registered patients to designate a registered caregiver under the program’s rules.

The same guidance says the cost of medical cannabis is not reimbursable by private or public insurance, Medicare, Medicaid or veterans’ covered plans. That makes the difference between a retail discount, a medical purchase and an insurance benefit especially relevant when comparing costs.

These distinctions do not diminish the value of a discount. They help a customer understand what the offer actually changes: the price of eligible merchandise, rather than their medical status, coverage or authorization to use cannabis in every setting.

The tax distinction matters at checkout

Maryland’s medical cannabis regulation exempts qualifying medical sales to patients and registered caregivers from sales and use tax. Adult-use purchases follow a different tax rule.

A 2026 Department of Legislative Services fiscal note explains that the state increased its adult-use cannabis tax from 9 percent to 12 percent beginning in fiscal 2026. An older price comparison using the original rate can therefore give the wrong impression of checkout cost.

For someone looking at a menu, the useful comparison is the final price after any applicable discount and tax, with the correct purchasing status. A percentage-off headline alone does not provide that amount, and the announcement does not give a universal final price for every product.

What to confirm before Friday

The address and ribbon-cutting time are the simplest starting points. Confirm the day’s program with the store, bring the identification required for the intended purchase and distinguish regular opening hours from the celebration’s individual activities. People using the medical program should also confirm current patient-service arrangements.

The opening adds a community occasion around an existing retail operation. Its immediate value is local: a chance to meet the operators and understand the store’s service. The wider consumer lesson is equally practical—event details, discounts and medical rules each deserve their own check before a cannabis shopping trip.

Illustrative stock main street; not the Rooted × ReLeaf store or its grand opening. Photo: Artūras Kokorevas / Pexels.

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Windsor Cannabis Seizure Highlights Canada’s Separate Border Rules

An October 21 tunnel seizure reported this week illustrates why legal domestic purchases, CBD labels and medical documents do not automatically permit border travel.

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Blue steel structure of the Ambassador Bridge viewed from below

A reported cannabis seizure at the Windsor–Detroit Tunnel is a reminder that buying legally on either side of the border does not authorize carrying the purchase between countries. The distinction applies to ordinary travellers as well as to much larger quantities, and includes products marketed as CBD.

In reporting published October 27, Windsor News Today’s Mark Brown described an October 21 secondary inspection involving a U.S. traveller. The report said officers seized 13 kilograms of cannabis and 49 THC vapes, and that the traveller received a $56,100 penalty and was returned to Detroit without criminal charges being filed.

Those case details come from the local report, which attributes the information to the Canada Border Services Agency. They describe a particular enforcement outcome, not a standard penalty schedule or a prediction of what would happen to another traveller.

A legal market does not create a travel exception

The CBSA’s current cannabis border guidance says taking cannabis across Canada’s border is illegal without a Health Canada permit or exemption. The rule applies when entering and leaving Canada, including travel to or from jurisdictions where cannabis is legal.

The guidance includes edible cannabis, extracts, topicals and products containing cannabidiol. It also says the restriction applies regardless of quantity. A small personal-use package therefore raises the same underlying authorization question as a larger shipment, even though the circumstances and enforcement outcome may differ.

That is the key distinction for a visitor planning a weekend trip. Domestic permission to possess or purchase cannabis answers a question about the place where it was bought. It does not establish permission to export it, import it or carry it through another country.

Medical paperwork is not automatically border authorization

Canada’s international travel guidance also separates a prescription from the permission needed to cross with cannabis. A medical document alone does not create that authorization, and permission from Canada does not guarantee acceptance by the destination or a transit country.

It distinguishes market-approved prescription drugs containing cannabis from other medical cannabis. Certain prescription drugs may be carried under specific regulatory requirements, while other medical cannabis requires an individual Health Canada exemption issued only in rare and exceptional circumstances. Travellers should check the exact product and applicable official requirements rather than generalize from another person’s prescription.

This distinction makes the medicine’s identity important. A prescription product, a dispensary extract and an online CBD purchase should not be treated as interchangeable merely because they all involve cannabinoids. Nor does keeping an item in its original package establish an import authorization.

CBD is covered too

Health Canada’s CBD guidance explains that CBD is regulated under the Cannabis Act. The rules apply whether CBD comes from industrial hemp or other cannabis varieties. A hemp-derived label does not, by itself, remove the product from that framework.

The agency describes import and export of CBD products as tightly limited activities. Its commercial framework involves an appropriately licensed holder, a shipment-specific permit and a legitimate medical or scientific purpose. That is a different process from an ordinary traveller deciding that a product is acceptable because it is sold over the counter at home.

For someone packing a bag, the practical implication is to examine what the item contains rather than rely on terms such as hemp, wellness or non-intoxicating. The border question concerns the product and the applicable permission, not just whether the user expects to feel high.

Declaring an item and being allowed to import it are different

The CBSA’s May 2022 border reminder states that personal, mail, courier and commercial shipments can be examined for prohibited goods. It warns that undeclared cannabis can lead to seizure, monetary penalties, arrest or prosecution, depending on the circumstances.

The agency’s message covers gifts and personal-use products as well as larger movements. Posting a purchase across the border is therefore not an ordinary alternative to putting it in a vehicle. The mode of travel or delivery does not erase the underlying restrictions. A purchase intended as a gift still needs to satisfy the applicable border rules before it can be transported.

The current CBSA guidance says cannabis must be declared to the CBSA when entering Canada. Declaration is a reporting obligation; it is not a substitute for the authorization required to bring the product in.

The Windsor report gives that distinction a timely local example. The broader preparation belongs before departure: check bags and vehicle storage, identify any cannabis-containing products and consult the official requirements for the full route. A legal purchase receipt and a lawful domestic market do not turn an international crossing into a domestic shopping trip.

Illustrative stock view of the Ambassador Bridge, a different Detroit–Windsor crossing from the tunnel in this report; not a seizure photograph. Photo: Hemz / Pexels.

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AiroPro Enters the UK Through a Medical Pharmacy Partnership

Airo and SOMAÍ announce four inhalation formulations with IPS Pharma distribution. Patient access still depends on prescribing and pharmacy supply.

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River Thames and London skyline at sunset

Airo and SOMAÍ have announced a United Kingdom launch for the AiroPro inhalation system, adding a new device-and-extract combination to the country’s medical cannabis market. The October 27 announcement names IPS Pharma as the exclusive UK distributor, with supply through pharmacies and healthcare providers rather than an ordinary recreational retail rollout.

According to SOMAÍ’s announcement, the initial portfolio contains four formulations. NYC Diesel and Pink Rozay sit in a Strain Series using cannabis-derived terpene blends; Lemon Cake and Mango Kush sit in an Artisan Series using botanical terpenes. The extracts are made at SOMAÍ’s Lisbon facility, which the company describes as EU-GMP certified.

The companies describe AiroPro as an integrated system in which the device and compatible extracts work together. They say the products are available through UK pharmacies. That is an account of commercial availability, not evidence that every clinic will prescribe the products or that every pharmacy already has stock.

A medical launch still begins with a clinical decision

The General Medical Council’s guidance makes the prescribing distinction clear. Unlicensed cannabis-based products for medicinal use must be supplied for use according to a prescription or direction from a doctor on its Specialist Register. Specialists must work within their competence and assess the individual patient.

The GMC says many cannabis medicines lack a UK marketing authorisation and may not have undergone MHRA assessment for safety, efficacy and quality. Prescribing can be appropriate when a specialist concludes that a patient’s specific clinical needs require it. That is different from a brand’s decision to introduce another format.

For shared care, the guidance calls for clarity about the medicine, dose, means of administration and treatment protocol. It also requires patients and other treating doctors to receive sufficient information for safe care. Those responsibilities remain relevant regardless of a product’s familiar cultivar name or the design of its hardware.

Manufacturing standards answer a different question

EU-GMP appears prominently in the launch announcement. The MHRA’s manufacturing guidance describes good manufacturing practice as the minimum production standard medicines manufacturers must meet. It addresses consistent quality and conformity with the applicable marketing authorisation or product specification.

Good distribution practice concerns obtaining medicines through the licensed supply chain and storing, transporting and handling them under suitable conditions. Regulators inspect manufacturing and distribution sites to assess compliance.

That framework helps explain the significance of a pharmaceutical manufacturing claim. It should not be treated as a clinical trial showing that one formulation works better than another. Production controls, distribution controls and an individual treatment decision are connected parts of the process, but each answers a different question.

Our recent LOT420 coverage similarly examined why the scope of a cannabis quality certification matters. A certification headline needs to be read alongside the activity and product it actually covers.

Importing a product is not the same as approving it

The MHRA’s guidance on unlicensed medicines explains the separate supply route. These medicines, often called specials, have no UK marketing authorisation. They may be supplied to meet individual clinical needs when available licensed medicines cannot meet those needs.

Importers need the relevant permissions and must notify the MHRA before importing an unlicensed medicine. The notification includes evidence concerning manufacturing and distribution standards and a special clinical need. The launch announcement therefore sits within an existing medicines framework; it does not announce a new exemption from it.

The NHS patient information also distinguishes prescribed medicines from products marketed online as medical cannabis. It advises patients to keep prescribed medicine in its original packaging, along with a prescription copy and any relevant doctor’s letter. The dispensing label identifies both the medicine and the person for whom it was prescribed.

NHS availability is a separate question from a company’s UK launch. The NHS explains that very few people in England are likely to receive an NHS medical cannabis prescription, and that other treatments are considered first. A product appearing in pharmaceutical distribution does not establish that it will be offered through every care pathway or paid for by the health service.

What this changes for a patient

The concrete development is a named distributor and a defined initial portfolio. Whether it changes an individual patient’s treatment depends on a clinical assessment, the prescription, pharmacy supply and the instructions for the specific device and extract. A U.S. brand’s reputation cannot settle those questions on its own.

The announcement gives clinicians and patients another product combination to discuss. It does not demonstrate comparative effectiveness, establish NHS funding or guarantee that a particular formulation is suitable for a particular condition. Those boundaries make the launch easier to understand: more supply options within medical channels, with the prescribing decision still resting on the patient’s circumstances.

Illustrative stock view of London; not an Airo, SOMAÍ or IPS Pharma facility. Photo: Matheus Bertelli / Pexels.

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