A compliance-first ashwagandha launch rests on four decisions: raw material that is tested on every lot, an extract whose type fits the regulatory route you want, a dose matched to that extract, and a label that names the plant part, the preparation and the cautions. In Canada, the extract type matters most. Health Canada's ashwagandha monograph covers dried root or whole plant, as a powder or a non-standardized ethanol or water extract. The standardized branded extracts that most US products use sit outside the monograph, which means a longer application with its own evidence.
This guide covers why the herb is getting more scrutiny, what goes wrong with ashwagandha products, and how to set up the formula and label for Canada and the US.
Why is ashwagandha getting more scrutiny?
Ashwagandha (Withania somnifera) became one of the best-selling herbs in North America after US sales surged in 2020 and 2021, and the attention brought more products and more questions about them.
In Europe, Denmark banned ashwagandha in food supplements in 2023 after a risk assessment by its national food institute, and other European regulators are reviewing it. In North America the herb stays legal, but product quality is uneven. When ConsumerLab tested popular US products in 2024, 8 of 13 contained only 7.8% to 83% of the withanolides their labels implied, and most held less than half.
None of this makes ashwagandha unsafe as a category. It does mean "ashwagandha extract" on a label no longer tells a buyer what is in the bottle.
What goes wrong with ashwagandha products?
Four problems account for most of the trouble.
Extracts that don't match their labels
Two products can both list "ashwagandha extract 600 mg" and contain very different material. Some use root only, some include leaf. Some are standardized to withanolides, the marker compounds most studied, at a few percent or much more. Some are not standardized at all, and some fall short of what they claim, as the ConsumerLab results show.
For a formulator, the answer is to specify the material and verify it:
- Name the plant part (root, or root and aerial parts where the market allows it).
- If you use a standardized extract, set a withanolide percentage and test it by HPLC.
- Test identity, potency and contaminants on every lot, at an ISO 17025 accredited lab.
Contaminants in the raw material
Botanicals can carry heavy metals, pesticide residues and microbial contamination from where they were grown and processed. Write specific limits into the supplier agreement, set to the strictest market you sell into (California's Proposition 65 is often the tightest for lead), and ask for a certificate of analysis on every lot. If a supplier can't provide one, choose another supplier.
Liver injury
The most serious documented harm is liver injury. The NIH's LiverTox database describes rare cases linked to ashwagandha products, and the cause is not fully understood. A brand should know these reports exist, keep its dose within studied ranges, and have a plan for handling adverse reaction reports from customers.
Drug interactions
Ashwagandha can interact with thyroid medication, sedatives, blood pressure medication, diabetes medication and immunosuppressants, according to the NIH Office of Dietary Supplements. Some of the online reports of thyroid or sleep problems describe exactly these interactions.
What does Health Canada's monograph allow?
Every natural health product sold in Canada needs a product licence and its Natural Product Number (NPN) before sale. The fastest route is a compendial (Class I) application against Health Canada's ashwagandha monograph, which sets:
- Source material: Withania somnifera root or whole plant, dry.
- Preparations: powder, or non-standardized extracts made with ethanol and/or water (dry extract, tincture, fluid extract, decoction, infusion).
- Dose for adults: 2 to 6 g of dried root a day for the traditional Ayurvedic uses, and 2.5 to 6.5 g of dried root or whole plant a day for the adaptogen use.
- Uses: traditional Ayurvedic uses, such as a Rasayana (rejuvenative tonic), relief of restlessness or nervousness that helps promote sleep, and memory enhancement, plus "used in Herbal Medicine as an adaptogen to help increase energy and resistance to stress over time".
- Cautions: ask a health care practitioner before use if pregnant or breastfeeding; take care driving or using machinery because of possible drowsiness; and, for some uses, ask a practitioner if symptoms persist or worsen.
A standardized extract at 300 to 600 mg a day, the format behind most US ashwagandha products and much of the clinical research (one trial tested 250 and 600 mg a day of a root extract), is outside the monograph. It can still be licensed, but through a Class II or III application supported by the extract's own evidence. Health Canada's service standard is 60 days for Class I, 90 days for Class II and 210 days for Class III, so decide the extract before you plan the launch date. Our NPN application service covers both routes.
What do US rules allow?
In the US, ashwagandha is sold as a dietary supplement under DSHEA, and structure/function claims such as "supports a healthy stress response" are allowed with the FDA disclaimer on the label and a notice to the FDA within 30 days of first marketing the claim. Claims about anxiety, insomnia or any other disease are drug claims.
What should an ashwagandha label say?
A transparent label includes:
- The Latin name and plant part, for example Withania somnifera root.
- The preparation, and the standardization if there is one, for example a root extract standardized to 5% withanolides by HPLC.
- The exact milligram amount per serving, with no proprietary blend hiding it.
- The branded extract name, if you use one with published clinical data.
- The cautions. In Canada these are the ones in your licence. In the US, many brands add the interactions (thyroid, sedative, blood pressure, diabetes and immunosuppressant medication) and pregnancy and breastfeeding.
A product sold in both countries needs a bilingual English and French label for Canada, with claims that work under both sets of rules. Our label compliance work covers both, and the ashwagandha ingredient page covers dosing and sourcing.
A checklist before you lock the formula
- Is the plant part named, and does it match the market (root, or whole plant in Canada)?
- Does the extract type fit the route you want: monograph material for a Class I NPN, or a standardized extract with its own evidence?
- Is there a certificate of analysis on every lot, plus independent testing for identity, withanolides and contaminants?
- Is the dose inside the monograph range or the range the extract's own trials used?
- Are the cautions on the label the ones the market requires?
- Are the claims inside the monograph or the licence in Canada, and structure/function only in the US?
- Is the finished product tested too, not only the raw material?
If any answer is unclear, settle it before the production run. A private label formula that already holds a licence is one starting point, and a custom formula through our partner network is another.
FAQ
Which ashwagandha material is easiest to license in Canada?
Dried root or whole plant, as a powder or a non-standardized ethanol or water extract, at the monograph dose (2 to 6 g of dried root a day for the traditional uses, 2.5 to 6.5 g for the adaptogen use). That qualifies for a Class I application. Standardized extracts need a Class II or III application.
Does ashwagandha need an NPN to sell in Canada?
Yes. Every natural health product sold in Canada needs a product licence and NPN from Health Canada before sale. Working inside the ashwagandha monograph is the fastest route, and anything outside it changes the application class and adds time.
How much withanolide should an ashwagandha extract have?
There is no single right number, because the dose has to match the extract. Branded extracts are standardized to different levels (KSM-66, for example, to at least 5%), and the clinical trials behind each one used specific doses. Match your dose to the trials for the extract you buy, and verify the percentage by HPLC on every lot.
Why do some people report side effects from ashwagandha?
The reports include stomach upset, drowsiness and, rarely, liver injury. Products vary widely in what they contain, and the herb interacts with several medications, including thyroid, sedative, blood pressure, diabetes and immunosuppressant drugs. Testing every lot and labeling the cautions clearly addresses the problems a brand can control.
Can the same ashwagandha SKU be sold in both Canada and the US?
Sometimes. The product needs a Canadian licence and a bilingual label carrying the claims and cautions in that licence, plus US structure/function wording with the FDA disclaimer. That is easiest when the formula uses monograph material and claims that fit both markets. A standardized US extract can work too, but only after a Class II or III licence in Canada.
What does third-party testing verify?
At minimum: identity (the material is Withania somnifera), withanolide content (it matches the certificate of analysis) and contaminants (heavy metals, microbes and pesticide residues). Test both the raw material and the finished product, because problems can enter at either stage.
If you are planning an adaptogen product and want a partner who can document every step, start a conversation here.
