How to Read a Supplement Label in Canada: NPN, DIN and What They Mean
The single most useful habit a Canadian supplement shopper can build is reading the label properly. Here's what the numbers and sections on a Canadian label actually mean — and how to use them to shop with confidence.
What is an NPN?
In Canada, natural health products — vitamins, minerals, herbal products, probiotics and more — are licensed by Health Canada before sale. A licensed product displays an eight-digit Natural Product Number (NPN) on its label. Seeing an NPN means Health Canada has reviewed that product for safety, efficacy and quality against its intended use. You can look any NPN up in Health Canada's Licensed Natural Health Products Database.
NPN vs DIN — what's the difference?
A DIN (Drug Identification Number) appears on over-the-counter and prescription drugs, while an NPN appears on natural health products. Both are Health Canada identifiers; they simply cover different product categories. If a product makes drug-style claims, it should carry the matching identifier.
The parts of the label that matter most
Beyond the brand name, focus on: the medicinal ingredients and amounts per serving; the recommended dose and directions; the duration of use; and the cautions and warnings, which tell you who should check with a professional first. Non-medicinal ingredients matter too if you avoid certain allergens, gelatin or added sweeteners.
Serving size and format
Two products with the same ingredient can differ hugely per serving — one capsule of one brand may equal three of another. Compare the amount per serving, not the bottle size. Format matters for convenience: capsules, powders, gummies and liquids all deliver the same ingredient in different ways.
How Ariavit fits in
Every product page at Ariavit shows the format, size and ingredient details from the label so you can compare before you buy — priced in CAD with free Canada-wide shipping. When in doubt about whether a product suits you, your pharmacist is a quick, free resource.
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Frequently asked questions
What does NPN mean on a supplement label?
NPN stands for Natural Product Number — an eight-digit licence number Health Canada assigns to natural health products it has assessed for safety, efficacy and quality. You can verify any NPN in Health Canada's public database.
Is a product with an NPN guaranteed to work for me?
An NPN means Health Canada reviewed the product for its labelled use — it doesn't replace individual advice. Whether a product suits you depends on your health, diet and medications, so check with a qualified professional.
What's the difference between NPN and DIN?
NPNs cover natural health products such as vitamins and herbal products; DINs cover drugs, including over-the-counter medicine. They are both Health Canada identifiers for different categories.
This article is general information, not medical advice, and it isn't a substitute for guidance from a qualified health professional. Supplements are not intended to diagnose, treat, cure or prevent any disease. In Canada, licensed natural health products carry a Natural Product Number (NPN) — always read the label and follow the directions, and talk to your doctor, pharmacist or another qualified professional before starting anything new, especially if you are pregnant, nursing, taking medication or managing a health condition.
