US guides
US food labelling, explained from the regulation
Practical guides for anyone who makes, packs or sells packaged food in the United States. Every requirement is quoted from the source with the date of the edition — the Food, Drug, and Cosmetic Act on govinfo.gov, and 21 CFR part 101 on the eCFR. Where we quote FDA guidance rather than the regulation, we say so: guidance is not law.
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Guide · Allergens
The Big 9 allergens: what a US label has to say
Nine foods, two permitted ways of declaring them, and three traps — tree nut species, highly refined oils, and the flavouring rule that overrides the flavouring rule.
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Guide · Nutrition Facts
How to read a Nutrition Facts label
The panel line by line: what the serving size really is, why “0 g” can mean 0.49 g, and the four lines that carry no percentage.
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Guide · Nutrition Facts
% Daily Value: what the right-hand column means
One column, two rounding rules. Four lines of the FDA’s own sample label only add up if you apply both — and most spreadsheets apply one.
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Basics · Labelling
US food label requirements: the five things every package needs
The statute lists what makes a food misbranded, not what a label needs. Here are the five elements that fall out of it — and the exemption that is easier to lose than to get.