### Question
How does the law define serving* or *serving size?


### Answer
Under *21 CFR § 101.4*, **serving* or *serving size** is defined as:

> an amount of food customarily consumed per eating occasion by persons 4 years of age or older which is expressed in a common household measure that is appropriate to the food. 

#### Citation:
  - *21 CFR § 101.4*
