Dietary Reference Intakes(DRIs)

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One, DRIs

  DRIs are developed on the basis of a set of RDAs average daily dietary nutrient intake reference values,Includes four content: Estimated Average Requirement(EAR)、Recommended Nutrient Intake(RNI)、Adequate Intakes(AI) and Tolerable Upper Intake Level(UL)。

Second, the basic concepts of DRIs

1、Estimated Average Requirement(EAR)

  EAR is based on the individual requirements of the research data developed; According to certain indicators to judge can satisfy a particular gender, Age and physiology groups 50% intake levels of individual requirements. This intake levels cannot meet group and 50% in the individual's need for the nutrients. The EAR is the basis of the set RDA.

2、Recommended Nutrient Intake(RNI)

  RNI is equal to the traditional use of RDA, Is can satisfy a particular gender, Age and physical condition of the vast majority of the population (97% -98%) intake level of individual requirements. Long-term intake of RNI levels, Can meet the needs of the body of the nutrients, Stay healthy and maintain in the organization have appropriate reserves. RNI main use is as an individual daily intake of the nutrients in the target. RNI is established on the basis of the EAR. When the EAR of the standard deviation is known, Add two standard deviations RNI as the EAR, Namely RNI = EAR+2SD. If the information on the required amount of variation is not sufficient, When the SD can not be calculated, Generally located EAR coefficient of variation of 10%, Such RNI = 1.2 × EAR.

3、Adequate Intakes(AI)

  In the individual requirements of insufficient research data can not be calculated EAR, So can't get RNI, Can be set Adequate Intake (AI) instead of RNI. AI was obtained from observation or experiment healthy crowd some nutrient intake. Such as exclusive breastfeeding for healthy full-term infants, From birth to 4-6 months. All their nutrients from breast milk. Amount of nutrients in breast milk supply is their AI values, The main purpose of AI is as an individual nutrient intake goals. AI and RNI similarities are both used as individual intake goals, Almost meet the target population all individuals needs. The difference between AI and RNI lie in AI accuracy far less RNI, May be significantly higher than the RNI. Therefore, when using the AI more careful than using RNI.

4、Tolerable Upper Intake Level(UL)

  UL is the highest amount of can average daily intake of certain nutrients. The amount of the general population are almost all individuals will not harm health. If the side effects and the total intake of certain nutrients related, So the nutrient UL is based on the total amount of food, water and supplements provided decide. Side effects such as fortified foods and supplements are only related to the UL to develop according to these sources.

Related Pages:
Dietary Guidelines for Chinese Residents
■ Dietary Reference Intakes (DRIs)
Recommended daily intake of energy and protein (RNIs) and features than fat
Recommended daily intake or Adequate Intake of major and trace elements
Recommended daily intake or suitable intake of fat-soluble and suitable water-soluble vitamins
Certain nutrients daily tolerable upper intake levels (ULs)
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