Start with the labelled quantity
Health Canada explains that the serving size at the top of a Canadian Nutrition Facts table is the quantity on which its calorie and nutrient information is based. It reflects a reference amount and typical consumption; it is not a recommendation for how much an individual should eat or drink.
Read both the household measure and the metric amount when supplied. Do not copy a nutrient value from a package into a recipe note without also keeping the quantity it describes.
Scale an ingredient, not the meaning of serving
Suppose a hypothetical label gives a value per thirty grams and a recipe uses sixty grams of that ingredient. For that ingredient, sixty grams represents twice the labelled quantity. That calculation does not establish the nutrient value of the complete dish: other ingredients, preparation and the final yield also matter.
Similarly, dividing the cooked dish into four portions does not make each portion equal to every ingredient’s labelled serving. A television portion can be a presentation choice, while a package’s serving quantity belongs to that product’s information table.
When halving or doubling a recipe, write the actual ingredient amounts first. Keep any estimates clearly identified rather than presenting them as a verified Nutrition Facts table.
Check what food state the numbers describe
Read whether information concerns the product as sold or as prepared, especially when preparation adds other ingredients. Follow the actual package wording. A dry quantity and a cooked quantity cannot be treated as the same mass without the relevant preparation context.
For a shared recipe note, retain the programme’s yield, the ingredient quantities and the label quantities in separate fields. This makes the arithmetic reviewable without turning the programme’s serving suggestion into personal dietary advice. If you need nutrition guidance for a medical condition, that is a separate task from interpreting a cooking video. The useful outcome here is narrower: another cook can see which numbers came from the recipe, which came from a product label and how you scaled them.
Related questions
Is a labelled serving size an instruction about how much I should eat?
Health Canada says it is not a recommendation.
Does doubling one ingredient’s labelled quantity calculate the whole dish?
No. It only scales that ingredient’s stated value under the same conditions.
Sources and scope
Scope notes distinguish published documentation, supplied information and editorial methods. They do not report a hands-on service test.
- Health Canada: Nutrition Facts tables — Consumer guidance on stated serving quantity and its non-recommendation status.
- CFIA: Nutrition Facts information — Primary explanation of as-sold and as-prepared contexts; no product-specific calculation claimed.
