the rdi is used to determine the daily value (dv) of foods, which is printed on nutrition facts labels (as % dv) in the united states and canada, and is regulated by the food and drug administration (fda) and health canada. the labels "high", "rich in", or "excellent source of" may be used for a food if it contains 20% or more of the rdi. the labels "good source", "contains", or "provides" may be used on a food if it contains between 10% and 20% of the rdi.