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Nutrition panels are declared to prescribed rounding increments, not to analytical precision. Under US rules, calories round to the nearest 5 below 50 and nearest 10 above; fat and sugars round to the nearest 0.5 g below 5 g and nearest gram above; values below 0.5 g are declared as zero.
Rounding rules
Energy: <5 kcal declare 0, 5-50 nearest 5, >50 nearest 10; fat and sugars: <0.5 g declare 0, <5 g nearest 0.5, >=5 g nearest 1
Rounding and declaration rules are set by labelling regulation and vary by jurisdiction. Confirm requirements for each market before printing a panel.
It can declare 0 g of fat if it contains under 0.5 g per serving, but a fat-free claim has its own separate criteria. Declaration rounding and nutrient content claims are different rule sets.
Yes. EU rounding guidance uses different increments and requires energy in both kJ and kcal per 100 g or 100 mL. Always apply the rules for the market of sale.