Dietary Reference Values DRVs The distribution of nutrient

Dietary Reference Values (DRVs) The distribution of nutrient requirements within a population. © Food – a fact of life 2009

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. © Food – a fact of life 2009

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. © Food – a fact of life 2009

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. © Food – a fact of life 2009

Reference Nutrient Intake The distribution of nutrient requirements within a population. Number of people RNI Requirements © Food – a fact of life 2009

RNI for calcium Children Vitamin A μg/day Males Vitamin A μg/day 0 -3 months 350 11 -14 years 600 4 -6 months 350 15 -18 years 700 7 -9 months 350 10 -12 months 350 19 -50 years 700 1 -3 years 400 50 + 700 4 -6 years 500 7 -10 years 500 © Food – a fact of life 2009 Females Vitamin A μg/day 11 -14 years 600 15 -18 years 600 19 -50 years 600 50+ years 600 Pregnancy +100 Lactation +350

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. © Food – a fact of life 2009

Estimated Average Requirement The distribution of nutrient requirements within a population. Number of people EAR Requirements © Food – a fact of life 2009

EAR for energy Children Boys MJ/day Girls MJ/day 0 -3 months 2. 28 2. 16 4 -6 months 2. 89 2. 69 7 -9 months 3. 44 3. 20 10 -12 months 3. 85 3. 61 1 -3 years 5. 15 4. 86 4 -6 years 7. 16 6. 46 7 -10 years 8. 24 7. 28 © Food – a fact of life 2009

EAR for energy Females MJ/day 11 -14 years 7. 72 15 -18 years 8. 83 19 -50 years 8. 10 51 -59 years 8. 00 Males MJ/day 11 -14 years 9. 27 60 -64 years 7. 99 15 -18 years 11. 51 65 -74 years 7. 96 19 -50 years 10. 60 75+ years 7. 61 Pregnancy MJ/day (0 -3 months only) +0. 8 Lactation (0 -1 month) +1. 9 (0 -2 months) +2. 2 51 -59 years 10. 60 60 -64 years 9. 93 (2 -3 months) +2. 4 +2. 0 9. 71 Group 1 (4 -6 months) (6+ months) +1. 0 Group 2 (4 -6 months) +2. 4 (6+ months) +2. 3 65 -74 years 75+ years 8. 77 © Food – a fact of life 2009

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. © Food – a fact of life 2009

Lower Reference Nutrient Intake The distribution of nutrient requirements within a population. Number of people LRNI Requirements © Food – a fact of life 2009

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. © Food – a fact of life 2009

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. © Food – a fact of life 2009

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. © Food – a fact of life 2009

Activity • Using the information sheet answer the following questions: • How much protein does a 17 year old boy need? • How much protein does a 17 year old girl need? • Can you explain why a boy needs more protein? • Can you explain why pregnant women need extra protein? • How many Kcals does a 16 year old boy need • How many Kcals does a 16 year old girl need • Can you explain why there is a difference between these figures for boys and girls? © Food – a fact of life 2009