The Reference Daily Intake or Recommended Daily Intake (RDI)

The Reference Daily Intake or Recommended Daily Intake (RDI) is the daily intake level of a nutrient that is considered to be sufficient to meet the requirements of 97–98% of healthy individuals in every demographic in the United States(where it was developed, but has since been used in other places).

The RDI is used to determine the Daily Value (DV) of foods, which is printed on nutrition facts labels in the United States, where it is regulated by the Food and Drug Administration (FDA), and in Canada and Australia.

The RDI is based on the older Recommended Dietary Allowance (RDA) from 1968, newer RDA's have since been introduced in the Dietary Reference Intake system, but the RDI is still used for nutrition labeling.

Food labeling reference tables

DVs used by the FDA for the following macronutrients are Daily Reference Values(DRV)

For people four years or older, eating 2,000 calories per day, the DRV's are:

Total Fat	65 g
Saturated Fatty Acids	20 g
Cholesterol	300 mg
Sodium	2300 mg
Potassium	4700 mg
Total Carbohydrate	300 g
Fiber	25 g
Protein	50 g

For vitamins and minerals, the RDIs are given in the following table, along with the more recent RDAs of the Dietary Reference Intakes (maximized over sex and age groups)

Nutrient	RDI	highest RDA of DRI
Vitamin A	5000 IU	3000 IU
Vitamin C	60 mg	90 mg
Calcium	1000 mg	1300 mg
Iron	18 mg	18 mg
Vitamin D	400 IU	600 IU
Vitamin E	30 IU	15 mg (33 IU of synthetic)
Vitamin K	80 μg	120 μg
Thiamin	1.5 mg	1.2 mg
Riboflavin	1.7 mg	1.3 mg
Niacin	20 mg	16 mg
Vitamin B6	2 mg	1.7 mg
Folate	400 μg	400 μg
Vitamin B12	6 μg	2.4 μg
Biotin	300 μg	30 μg
Pantothenic acid	10 mg	5 mg
Phosphorus	1000 mg	1250 mg
Iodine	150 μg	150 μg
Magnesium	400 mg	420 mg
Zinc	15 mg	11 mg
Selenium	70 μg	55 μg
Copper	2 mg	900 μg
Manganese	2 mg	2.3 mg
Chromium	120 μg	35 μg
Molybdenum	75 μg	45 μg
Chloride	3400 mg	2300 mg

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