© british nutrition foundation 2013 nutritional requirements people require a variety of nutrients...

© BRITISH NUTRITION FOUNDATION 2013

Nutritional requirements

People require a variety of nutrients to stay healthy and reduce the risk of diet-related diseases.

The amount of each nutrient needed is called the nutritional requirement.

These are different for each nutrient and also vary between individuals and life stages, e.g. women of childbearing age need more iron than men.


Nutrient requirements

DRVs are estimates of the requirements for groups of people and are not recommendations or goals for individual people.

There are three types of estimates: •Estimated Average Requirements (EARs); •Reference Nutrient Intakes (RNIs);•Lower Reference Nutrient Intakes (LRNIs).


Estimated Average Requirement (EAR)

This is an estimate of the average requirement for energy or a nutrient.

Approximately 50% of a group of people will require less energy or nutrient, and 50% will require more.

No. of people

RequirementsEAR


Reference Nutrient Intake (RNI):

The RNI is the amount of a nutrient that is enough to ensure that the needs of nearly all the group (97.5%) are being met. The RNI is used for recommendations on protein, vitamins and minerals.

RNI

No. of people

Requirements


Lower Reference Nutrient Intake (LRNI)

The amount of a nutrient that is enough for only the small number of people who have low requirements (2.5%). The majority of people need more.

No. of people

RequirementsLRNI


Vitamin & mineral intakes: % below LRNIMale Female

Age, years 4-10 11-18 19-64 65+ 4-10 11-18 19-64 65+

Vitamin A 5 12 8 3 4 14 5 1

Riboflavin 1 8 4 5 1 20 11 2

Folate 0 2 2 0 0 6 3 3

Iron 1 6 1 2 1 45 21 0

Calcium 0 7 4 2 2 18 8 2

Magnesium 0 27 16 18 3 50 11 9

Potassium 0 17 11 14 0 31 23 18

Zinc 5 11 9 9 8 19 3 0

Selenium 0 22 25 31 1 44 50 52

Iodine 2 8 5 0 3 20 9 1

This table shows the proportion of the UK population who have intakes below the LRNI as highlighted below.

Source: National Diet and Nutrition Survey, Rolling Programme Years 1, 2 and 3, 2008-2011


Dietary reference values

In summary:

EAR is used for energy. The EARs for energy are based on the present lifestyles and activity levels of the UK population.

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

LRNI is a useful measure of nutritional inadequacy.


British Nutrition FoundationImperial House15-19 KingswayLondon WC2B 6UN

Telephone: 020 7557 7930Email: [email protected]: www.nutrition.org.uk www.foodafactoflife.org.uk

© british nutrition foundation 2013 nutritional requirements people require a variety of nutrients...

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