Nutrition label
A nutrition label is the panel on packaged food that declares its energy and nutrients per 100 g or 100 ml and, in some regions, per serving, as required by regulation and declared by the producer. IZeat treats a label as its most certain source: the assistant reads it in a photo or in text, repeats the values back before recording, and stores the item with the source label.
A label's figures beat a customer's own figure, a reference value and an estimate, in that order, because they were declared for that product from its recipe. The assistant reads the per-100 g column, scales it to the weight eaten, and says the result back so a misread comma or a serving mistaken for 100 g is caught before anything is stored. The label's calorie figure is kept as printed; IZeat never recomputes it from the macros. The assistant also reads the label the way a careful person would: it checks that the energy figure is in the unit its heading says, kJ or kcal, and that the calories agree with the protein, carbohydrate and fat printed next to them. Real packaging gets both wrong often enough, and a reader who reasons catches what a copied figure passes on.
Labels differ by region in ways that matter to a record: European panels give energy in kJ and kcal per 100 g and list fibre outside carbohydrate; American panels give calories per serving and count fibre inside total carbohydrate. IZeat stores what the label says and names the label as source, so the difference is visible rather than silently blended. A photo of the panel is the easiest way to give the assistant the numbers, and the reply is the check.
Put it into practice: Photos.
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