Traditional Medicine Claims Under Canada's Natural Health Products Regulations: What Evidence NHPD Actually Requires

Health Canada requires a 50-year documented history of use before it will accept a traditional health claim on a natural health product — and the clock comes with conditions most applicants underestimate.

The Natural Health Products Regulations (NHPR, SOR/2003-196) are precise about what qualifies as traditional use, and reviewers at the Natural and Non-prescription Health Products Directorate (NNHPD) apply that precision consistently. Yet a significant share of traditional use applications still reach deficiency status, often for the same correctable reasons: vague claim language, incomplete reference citations, and evidence packages that don’t actually support the claims they’re supposed to justify.

Understanding the evidentiary standard before you file is the difference between a Class I application that moves through Health Canada’s 210-day review target and one that enters deficiency limbo for two-plus years. There’s a persistent misconception that “traditional use” represents a lower evidentiary bar than clinical evidence. It isn’t lower — it’s a different standard entirely, with its own rules and its own traps.

How Health Canada Defines “Traditional Use” Under the NHPR

The NHPR defines a traditional health claim as one rooted in use within a recognized traditional medicine system, with a documented history spanning at least 50 years. That 50-year minimum alone isn’t sufficient — at least two-thirds of that period (roughly 33 years or more) must reflect use within the context of a recognized traditional paradigm.

Recognized systems include Traditional Chinese Medicine, Ayurveda, Western botanical herbalism, Indigenous traditional medicine, and several others. Homeopathic medicines follow a parallel pathway under DIN-HM, with a distinct evidence structure. The system you reference matters because it determines which reference texts are considered authoritative, how your claim language must be framed, and how reviewers assess the sufficiency of your package.

One thing many applicants miss: the 50-year window doesn’t have to terminate at today’s date. Evidence predating the NHPR’s 2004 enactment is entirely valid — provided it’s documented. Stating that an herb “has been used for centuries” without specific text-based support is marketing copy, not regulatory evidence, and NNHPD reviewers treat it as such. The difference between a successful traditional use application and a deficiency notice often comes down to whether you have the documentation to back that statement up, or whether you assumed the reviewer would accept it on cultural familiarity alone.

The Three Evidence Categories Health Canada Accepts

Health Canada’s “Evidence for Traditional Use” guidance document outlines three accepted categories of evidence for traditional health claims. Knowing which tier applies to your product — and what documentation it requires — is the foundation of any clean submission.

Category 1: Pharmacopoeial and Formulary References

The highest-confidence evidence comes from recognized pharmacopoeias and formularies. For botanical products, this includes the British Herbal Pharmacopoeia (BHP), the British Herbal Compendium, the German Commission E Monographs, and WHO Monographs on Selected Medicinal Plants. For Ayurvedic products, the Ayurvedic Pharmacopoeia of India is typically accepted. For TCM products, recognized TCM formularies and the Chinese Pharmacopoeia carry appropriate weight.

The critical nuance: your evidence must support the specific claim you’re making, for your specific dosage form and route of administration. A Commission E entry supporting oral use of valerian for sleep tension supports an oral capsule claim for sleep disturbance. It does not automatically extend to a topical application, and it doesn’t support a sleep claim worded beyond the scope of what the monograph actually describes. Reviewers make these distinctions — your submission needs to as well.

Category 2: Published References and Recognized Secondary Texts

Beyond pharmacopoeias, Health Canada accepts peer-reviewed ethnobotanical literature, historical medical texts, and a range of well-established secondary references. The ESCOP Monographs, the AHPA Botanical Safety Handbook, and Mills & Bone’s Principles and Practice of Phytotherapy are examples that reviewers take seriously.

General wellness books, popular health publications, and online ingredient databases are not acceptable. Reviewers look for systematic, practitioner-level documentation of medicinal intent — not broad cultural familiarity with an ingredient. The bar isn’t impossibly high, but it is deliberately professional.

Category 3: Traditional Use Documentation

This is where the most applications run into serious trouble. For lesser-known botanicals or novel ingredient combinations where pharmacopoeial coverage is absent, applicants must provide original traditional use documentation. That means:

• Records from credentialed traditional practitioners within the relevant cultural system
• Historical formulary texts or clinical records in their original language, with certified translations
• Ethnographic or anthropological corroboration of medicinal (not merely dietary) use
• Clear evidence that the documented use period and context satisfies both the 50-year requirement and the two-thirds threshold

For a product drawing on a regional Ayurvedic tradition, this can mean sourcing Sanskrit-language texts, obtaining certified translations, and securing practitioner declarations documenting generations of therapeutic use. That’s not a quick process under any circumstances — and discovering the requirement after a deficiency notice arrives is one of the more expensive ways to learn it.

Getting the Claim Language Right

Even when the evidence is solid, claim wording is where applications most reliably generate deficiency notices. The NHPR mandates a specific format for traditional health claims, and deviations — even unintentional ones — prompt reviewer follow-up that costs weeks.

Required format: “Traditionally used in [name of traditional medicine system] for [health benefit].”

Acceptable examples:

• “Traditionally used in Western herbalism for the relief of mild anxiety and restlessness.”
• “Traditionally used in Traditional Chinese Medicine as a tonic to support healthy kidney function.”

The most common wording mistakes reviewers flag:

Dropping “traditionally.” Writing “Used in Western herbalism for relief of anxiety” removes the qualifier that establishes a traditional — not clinical — evidence basis. That sentence now reads as a therapeutic claim requiring clinical evidence, and your traditional use dossier won’t satisfy it.

Blending modern efficacy language with traditional attribution. “A remedy trusted for centuries — clinically shown to support liver health” combines two incompatible evidentiary frameworks in a single claim. Health Canada reads the clinical modifier as a therapeutic claim trigger, regardless of how the sentence is structured.

Vague system attribution. “Used in ancient medicine traditions to restore energy” names no recognized system. Reviewers will issue a deficiency asking you to identify the system and provide system-appropriate evidence. The phrase sounds authoritative; it isn’t.

Claim drift from the evidence. If your Commission E monograph supports a nervous tension indication, don’t file a claim for insomnia. Related isn’t equivalent, and reviewers will catch the mismatch. Your claim language must stay tightly within the scope of what your evidence explicitly supports — not what you believe it implies.

A Documentation Checklist Before You Submit

Certain documentation gaps are nearly universal among applications that generate deficiencies. This checklist won’t replace a thorough regulatory review, but running through it before filing catches the most predictable problems.

• Ingredient-dose-claim alignment. Every claim traces back to evidence for the specific ingredient, at the specific dose in your formulation, via your specific route of administration. Multi-ingredient products need this alignment verified for each active independently.
• Consistent botanical nomenclature. Names used throughout your application must match the nomenclature in your referenced texts. Valeriana officinalis and Valeriana sp. are not interchangeable in a reviewer’s assessment.
• Complete bibliographic citations. Every reference includes author, title, year, publisher, and edition. Truncated citations generate follow-up requests and add real time to your review.
• Claim-to-evidence mapping. Prepare a cross-reference matrix that maps each proposed claim to the specific pages, paragraphs, or monograph sections that support it. Reviewers are not obligated to mine your reference package for you — and they won’t.
• Certified translations. Any reference text in a language other than English or French requires a certified translation. There are no exceptions.
• Traditional system consistency. An Ayurvedic submission relies on Ayurvedic references. Mixing TCM evidence into an Ayurvedic claim package signals an incoherent evidence basis and draws additional scrutiny. Pick a system and document within it.

What to Realistically Expect on Timeline

Health Canada’s Class I review target is 210 days — and that window applies specifically to traditional use applications that arrive complete, with no safety signals and no evidentiary deficiencies. A single deficiency notice pauses a portion of the review clock. Applicants who receive multiple deficiency cycles — not uncommon for complex combination products or novel ingredients without robust pharmacopoeial coverage — routinely report total timelines of 18 months to 3 years from submission to licence issuance.

The way to protect that timeline is to do the evidentiary groundwork before submission, not in response to a deficiency notice. A thorough pre-submission review against Health Canada’s current guidance documents — including “Evidence for Traditional Use,” the Licensed Natural Health Products Database, and the relevant pharmacopoeial monographs — tends to surface the same issues reviewers eventually flag. Finding them first is always less costly than finding them after the fact.

Your submission won’t be perfect. But it can be defensible, well-documented, and complete enough to clear the first review cycle without generating requests for additional information. For most Canadian NHP manufacturers, that’s the single highest-leverage thing you can do to shorten your path to market.

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Written by Nour Abochama, Quality & Regulatory Advisor, Androxa. Learn more about our team

Talk to our team about Health Canada compliance. Contact us

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