Based upon the available scientific evidence, quantity of a vitamin or mineral established by the Food and Nutrition Board of the National Academy of Sciences, Washington, D.C., as adequate "to meet the needs of practically all healthy persons." The RDA differs from the Minimum Daily Requirement (MDR), the minimum that must be ingested to prevent dietary deficiency.

A group of standards put forth by the National Research Council indicating the minimum amount of nutrients that should be eaten daily.

the amount of each vitamin and mineral a person needs each day to stay healthy

the amount of a nutrient that is recommended each day to avoid deficiency diseases. RDA are established by the U.S. Department of Agriculture (USDA) in conjunction with the FDA.

Represents the recommended composition of a daily diet, including vitamins, minerals, proteins, fat and carbohydrates. The amounts of each varies with age, physical health and condition.

Dietary intake goals established by the U.S. Food and Drug Administration and based on the highest RDA values in a gender/age group. US RDAs are more widely used than RDAs.

The level of essential nutrients required to adequately meet the known nutrient needs of practically all healthy persons, according to the Food and Nutrition Board of the National Academy of Sciences.