Dietary Reference Intakes (DRIs)
Dietary Reference Intakes (DRIs) are a comprehensive set of nutrient reference
values used by nutrition professionals, governments, and healthcare providers to plan
and assess the nutrient intakes of healthy people.
Developed by the National Academy of Medicine (formerly the Institute of
Medicine) in the United States and Canada, DRIs are the scientific foundation for
nutrition guidelines, public health policies (like school lunch programs), and
developing nutrition labels.
DRIs are an umbrella term for a set of different values. They are not a single number
but a collection of reference points that serve different purposes, specified by life
stage and gender.
Here are the key components of the DRIs in detail.
1. Estimated Average Requirement (EAR)
What it is: The EAR is the average daily intake level of a nutrient estimated to meet
the requirements of 50% (half) of the healthy individuals in a specific life stage and
gender group.
Key Use (Planning for Groups): The EAR is the primary tool used for assessing the
adequacy of nutrient intakes for an entire population or group (like soldiers in a
barracks or residents in a nursing home). It is not used as a goal for individuals, as it
would leave half the people deficient.
Relationship: The EAR is the starting point. The RDA is scientifically derived from
the EAR.
2. Recommended Dietary Allowance (RDA)
What it is: The RDA is the average daily intake level sufficient to meet the nutrient
requirements of nearly all (97-98%) healthy individuals in a particular group.
Calculation: It's a scientific calculation based on the EAR. Mathematically, the RDA
is set at two standard deviations above the EAR ($RDA = EAR + 2 \text{ SD}$).
Dietary Reference Intakes (DRIs) are a comprehensive set of nutrient reference
values used by nutrition professionals, governments, and healthcare providers to plan
and assess the nutrient intakes of healthy people.
Developed by the National Academy of Medicine (formerly the Institute of
Medicine) in the United States and Canada, DRIs are the scientific foundation for
nutrition guidelines, public health policies (like school lunch programs), and
developing nutrition labels.
DRIs are an umbrella term for a set of different values. They are not a single number
but a collection of reference points that serve different purposes, specified by life
stage and gender.
Here are the key components of the DRIs in detail.
1. Estimated Average Requirement (EAR)
What it is: The EAR is the average daily intake level of a nutrient estimated to meet
the requirements of 50% (half) of the healthy individuals in a specific life stage and
gender group.
Key Use (Planning for Groups): The EAR is the primary tool used for assessing the
adequacy of nutrient intakes for an entire population or group (like soldiers in a
barracks or residents in a nursing home). It is not used as a goal for individuals, as it
would leave half the people deficient.
Relationship: The EAR is the starting point. The RDA is scientifically derived from
the EAR.
2. Recommended Dietary Allowance (RDA)
What it is: The RDA is the average daily intake level sufficient to meet the nutrient
requirements of nearly all (97-98%) healthy individuals in a particular group.
Calculation: It's a scientific calculation based on the EAR. Mathematically, the RDA
is set at two standard deviations above the EAR ($RDA = EAR + 2 \text{ SD}$).
