What is the uncertainty in the measurements allowed in the "Nutrition Facts" section on food?
Look on page 28 where fats are listed. In that same section you can see calories, how carbys are calculated etc. The uncertainty depends upon the amount; i.e., if less than 0.5 it will labeled s zero. Between 0.5 and 5 values are rounded to the nearest 0.5. Above 5 values are entered rounded to the nearest 1 gram.
https://www.fda.gov/files/food/published/Food-Labeling-Guide-%28PDF%29.pdf
The uncertainty is 0.5 g (for mass) from zero to 5 grams. Above 5 it is 1 g,
To determine the uncertainty in the measurements allowed in the "Nutrition Facts" section on food, you can refer to food labeling regulations set by the appropriate governing body in your region. In the United States, the Food and Drug Administration (FDA) regulates the nutrition labeling of most packaged foods. The regulations outlined by the FDA provide guidelines for the accuracy and permissible variations in nutrition values that appear on food labels.
According to the FDA regulations, there are specific tolerance levels for the declared nutrient values in the "Nutrition Facts" section. These tolerance levels allow for small variations or uncertainties in the measured quantities. For example, the FDA permits a variation of up to 20% for most nutrients (except total carbohydrates) between the labeled value and the actual measured value.
It's important to note that these tolerance levels are not applicable to all nutrients. Certain nutrients, such as vitamin A and C, calcium, and iron, have their own specific tolerance levels, which should be adhered to.
To determine the specific uncertainty or tolerance for each nutrient, you can refer to the FDA's Code of Federal Regulations (CFR) Title 21, Part 101.9. This regulation provides detailed requirements for nutrition labeling and specifies the allowable variations for each nutrient.
By referring to the applicable regulations for your region and the specific product, you can find information regarding the uncertainty or permissible variations in the measurements for the "Nutrition Facts" section on food.