Dietary Information - AS1 - N&FS

  • Created by: sarahj123
  • Created on: 19-04-19 20:58

Dietary reference values

Umbrella term = DESIRABLE CONSUMPTION LEVEL OF NUTRIENTS BY (POPULATION GROUP) HEALTHY PEOPLE = assess energy requirements for large group 

* NOT FOR INDIVIDUALS= different needs = intake vary *

Activity & expenditure vary 

Safe intake= insufficient evidence to set DRV = level where no risk of deficiency & toxicity

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DRV Types

Estimated average requirements ( ENERGY ) - EARS - meet needs of 1/2 population 

Reference nutrient intake ( PROTEIN & VIT & MINERALS ) - RNI - meet needs of 97%

Lower reference nutrient intake - LRNI - Meet needs of 3% 

Not for individuals:

  • Pregnant = Ears inc by 200kcal in 3rd trimester ( foetus growth )
  • Breastfeeding =inc energy requirements ( depend on duration )
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Why we need

  • Amount of each nutrient needed = defines healthy diet
  • Amount needed to prevent deficiency = NOT SAME as amount for optimal good health 
  • Nutrients stored in body for times of need

Fat soluble vitamins (ADEK) = accumulate in body = can be toxic

SACN SET DRV = IRON & VITAMIN D & FOLATE

Nutrient requirement = amount of each nutrient needed

Depends on:

  • Age
  • Gender
  • Activity
  • Health
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How used

  • asses diet intake of group

Ears based on :

  • Lifestyle
  • Activity
  • Boys = require more 
  •  >18 = require less
  •  50 + = require less = lower BMR & activity

Ears =  BMR x Activity

 

* Learn table *

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When used

  • Labels = provide info + help make better choices
  • Policy =set targets for nutrient intake + public health assessments
  • Health-care =Set standards for feeding in group facilities + set goals for vit & mineral intake
  • Academic = help with labels + laws + lower disease risk

Factors affecting requirements :

  • Age
  • Gender
  • Growth
  • Pregnancy
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