Dietary reference values drvs
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Dietary Reference Values (DRVs). The distribution of nutrient requirements within a population. Learning objectives. To know about the development of Dietary Reference Values. To understand Estimated Average Reference (EAR) values. To understand Reference Nutrient Intake (RNI) values.

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Dietary Reference Values (DRVs)

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Dietary reference values drvs

Dietary Reference Values (DRVs)

The distribution of nutrient requirements within a population.


Learning objectives

Learning objectives

  • To know about the development of Dietary Reference Values.

  • To understand Estimated Average Reference (EAR) values.

  • To understand Reference Nutrient Intake (RNI) values.

  • To understand Lower Reference Nutrient Intake (LRNI) values.


Nutritional requirements

Nutritional Requirements

In 1991, a committee of experts researched and set the Dietary Reference Values (DRVs).

DRVs are a series of estimates of the amount of energy and nutrients needed by different groups of healthy people in the UK population.


Nutritional requirements1

Nutritional Requirements

It is important to recognise that individual nutritional needs vary widely. These figures are based on population groups, not individuals.

The Reference Nutrient Intake (RNI) is the amount of a nutrient that is enough to ensure that the needs of nearly all the population (97.5%) are being met.


Reference nutrient intake

Reference Nutrient Intake

The distribution of nutrient requirements within a population.

Number of people

RNI

Requirements


Rni for calcium

RNI for calcium


Nutritional requirements2

Nutritional Requirements

The Estimated Average Requirement (EARs) is an estimate of the average requirement for energy, for a nutrient. Approximately 50% of the population will need less energy or the nutrient and 50% of the population will need more.


Estimated average requirement

Estimated Average Requirement

The distribution of nutrient requirements within a population.

Number of people

EAR

Requirements


Ear for energy

EAR for energy


Ear for energy1

EAR for energy


Nutritional requirements3

Nutritional Requirements

The Lower Reference Nutrient Intake (LRNI) is the amount of a nutrient that is enough for only the small number of people who have low requirements (2.5%). The majority of the population will need more.


Lower reference nutrient intake

Lower Reference Nutrient Intake

The distribution of nutrient requirements within a population.

Number of people

LRNI

Requirements


Nutritional requirements4

Nutritional Requirements

The following two tables show the percentage of the male and female population in Britain who were not

achieving the Lower Reference Nutrient Intake (LRNI) of vitamins and minerals in 2003.


Vitamin mineral intakes below lrni

Vitamin & mineral intakes: % below LRNI

What conclusions can be drawn from this table?

Source: National Diet and Nutrition Survey 2003


Vitamin mineral intakes below lrni1

Vitamin & mineral intakes: % below LRNI

What conclusions can be drawn from this table?

Source: National Diet and Nutrition Survey 2003


Dietary reference values

Dietary Reference Values

DRVs are important for ensuring adequate intakes of energy and nutrients occurs throughout life.

Many health concerns and illnesses are linked to malnutrition.

The DRVs assist in preventing malnutrition.


Dietary reference values1

Dietary Reference Values

In summary:

EAR is used for energy.

RNI is often used as a reference amount for population groups.

LRNI is a useful measure of nutritional inadequacy.


Review of the learning objectives

Review of the learning objectives

  • To know about the development of Dietary Reference Values

  • To understand Estimated Average Reference (EAR) values.

  • To understand Reference Nutrient Intake (RNI) values.

  • To understand Lower Reference Nutrient Intake (LRNI) values.


Dietary reference values drvs

For more information visit www.foodafactoflife.org.uk


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