NFS/NS & other terms

• NFS = not further specified.
• NS = not specified.
• Food codes with NFS, NS, quantity not specified, or guideline amount per... in the measure description are used when the amount of food eaten is not known.
• For more information about the use of not specified items in survey research, see documentation on defaults used for coding.

Unexpected 0 values

• For a food whose 100 gram measure contains a given nutrient, even a very small serving amount of that food contains at least a trace of that nutrient. However, due to downward rounding of final decimals less than 5, some trace amounts may be displayed as zero. The number of decimal places to which nutrient values are expressed varies by nutrient.