Dietary reference values DRVs BRITISH NUTRITION FOUNDATION 2017

Dietary reference values (DRVs) © BRITISH NUTRITION FOUNDATION 2017

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. © BRITISH NUTRITION FOUNDATION 2017

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. © BRITISH NUTRITION FOUNDATION 2017

Why do you think nutritional requirements vary? Individual requirements of each nutrient are related to: • age; • gender; • level of physical activity; • state of health. Some people absorb or utilise nutrients less efficiently than others and so will have higher than average nutritional requirements. © BRITISH NUTRITION FOUNDATION 2017

Nutrient requirements: Dietary Reference Values (DRVs) In the UK, most of the estimated dietary requirements for particular groups of the population are based on advice that was published by the Committee on Medical Aspects of Food and Nutrition Policy (COMA) in the 1991 report Dietary Reference Values for Food Energy and Nutrients for the United Kingdom. These are known as the Dietary Reference Values (DRVs). Since this time, COMA has been superseded by the Scientific Advisory Committee on Nutrition (SACN). From time to time, SACN has reviewed the evidence for particular nutrients but in most cases has not identified a need to change the DRVs. © BRITISH NUTRITION FOUNDATION 2017

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). © BRITISH NUTRITION FOUNDATION 2017

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 EAR © BRITISH NUTRITION FOUNDATION 2017 Requirements

EARs SACN has also published new reference values for daily energy requirements as follows: Children and teenagers Months 1 -2 3 -4 5 -6 7 -12 Boys (MJ) 2. 2 2. 4 2. 5 2. 9 Breast-fed Boys (kcal) Girls (MJ) 526 2. 0 574 2. 2 598 2. 3 694 2. 7 Years Boys (MJ) Boys (kcal) 1 3. 2 765 2 4. 2 1004 3 4. 9 1171 4 5. 8 1386 5 6. 2 1482 6 6. 6 1577 7 6. 9 1649 8 7. 3 1745 9 7. 7 1840 10 8. 5 2032 11 8. 9 2127 12 9. 4 2247 13 10. 1 2414 14 11. 0 2629 15 11. 8 2820 16 12. 4 2964 17 12. 9 3083 18 13. 2 © BRITISH NUTRITION FOUNDATION 20173155 Girls (MJ) 3. 0 3. 9 4. 5 5. 4 5. 7 6. 2 6. 4 6. 8 7. 2 8. 1 8. 5 8. 8 9. 3 9. 8 10. 0 10. 1 10. 3 Girls (kcal) 478 526 550 646 Girls (kcal) 717 932 1076 1291 1362 1482 1530 1625 1721 1936 2032 2103 2223 2342 2390 2414 2462

EARs Adults Years Men (MJ) Men (kcal) Women (MJ) Women (kcal) 19 -24 11. 6 2772 9. 1 2175 25 -34 11. 5 2749 9. 1 2175 35 -44 11. 0 2629 8. 8 2103 45 -54 10. 8 2581 8. 8 2103 55 -64 10. 8 2581 8. 7 2079 65 -74 9. 8 2342 8. 0 1912 75+ 9. 6 2294 7. 7 1840 In the UK the recommendation (dietary reference value) for energy intake during pregnancy is an extra 200 kcal/day during the third trimester only. © BRITISH NUTRITION FOUNDATION 2017

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. No. of people Requirements © BRITISH NUTRITION FOUNDATION 2017 RN I

Example RNI (Vitamin A) Children Vitamin A μg/day 0 -3 months 350 4 -6 months 350 7 -9 months 350 10 -12 months 350 1 -3 years 400 4 -6 years 400 7 -10 years 500 Females Vitamin A μg/day Males Vitamin A μg/day 11 -14 years 600 15 -18 years 700 19 -50 years 600 19 -50 years 700 50+ years 600 50 + 700 Pregnancy +100 Lactation +350 © BRITISH NUTRITION FOUNDATION 2017

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 LRNI Requirements © BRITISH NUTRITION FOUNDATION 2017

This table shows the proportion of the UK population who have intakes below the LRNI as highlighted below. Vitamin & mineral intakes: % below LRNI Male Female Age, years 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 What conclusions can be drawn from this table? © BRITISH NUTRITION FOUNDATION 2017 Source: National Diet and Nutrition Survey, Rolling Programme Years 1, 2 and 3, 2008 -2011

Dietary reference values DRVs are important for ensuring adequate intakes of energy and nutrients throughout life. Many health concerns and illnesses may be linked to malnutrition. The DRVs assist in preventing malnutrition. © BRITISH NUTRITION FOUNDATION 2017

Dietary reference values 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 FOUNDATION 2017

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. © BRITISH NUTRITION FOUNDATION 2017

Question True or false? Nutritional requirements are the same for everyone. True False © BRITISH NUTRITION FOUNDATION 2017

False. Nutritional requirements are different for everyone. © BRITISH NUTRITION FOUNDATION 2017 Next question

Question True or false? Estimated Average Requirements are set for vitamins and minerals. True False © BRITISH NUTRITION FOUNDATION 2017

False. Estimated Average Requirements are set for carbohydrate and fat. © BRITISH NUTRITION FOUNDATION 2017 Next question

Question True or false? DRVs are targets for individuals to meet. True False ©

False. DRVs are set for populations, not individuals. The end © BRITISH NUTRITION FOUNDATION

Quiz- Kahoot Open the link below on the main screen and get students to log onto kahoot. it on their tablets or smartphones. They can then enter the code (that will come up on the main screen when you start the game) and their own nickname. They can then play along with the quiz choosing the multiple choice answers that correspond with the questions on the main screen. There will then be a leaderboard of the scores after each question and at the end. https: //play. kahoot. it/#/? quiz. Id=08 d 92 dc 0 -5661 -484 a-b 774 -1 ad 638928 bda © BRITISH NUTRITION FOUNDATION 2017

The information in this Power. Point presentation has been taken from www. nutrition. org. uk. For more information on DRVs click here. British Nutrition Foundation New Derwent House, 69 -73 Theobalds Road, London, WC 1 X 8 TA Email: postbox@nutrition. org. uk Web: www. nutrition. org. uk www. foodafactoflife. org. uk © BRITISH NUTRITION FOUNDATION 2017