<Ul> <Li> Estimated Average Requirements ( EAR ) , expected to satisfy the needs of 50 % of the people in that age group based on a review of the scientific literature . </Li> <Li> Recommended Dietary Allowances ( RDA ) , the daily dietary intake level of a nutrient considered sufficient by the Food and Nutrition Board of the Institute of Medicine to meet the requirements of 97.5 % of healthy individuals in each life - stage and sex group . The definition implies that the intake level would cause a harmful nutrient deficiency in just 2.5 % . It is calculated based on the EAR and is usually approximately 20 % higher than the EAR ( See Calculating the RDA ) . </Li> <Li> Adequate Intake ( AI ) , where no RDA has been established , but the amount established is somewhat less firmly believed to be adequate for everyone in the demographic group . </Li> <Li> Tolerable upper intake levels ( UL ) , to caution against excessive intake of nutrients ( like vitamin A ) that can be harmful in large amounts . This is the highest level of daily nutrient consumption that is considered to be safe for , and cause no side effects in , 97.5 % of healthy individuals in each life - stage and sex group . The definition implies that the intake level would cause a harmful nutrient excess in just 2.5 % . The European Food Safety Authority ( EFSA ) has also established ULs which do not always agree with U.S. ULs . For example , adult zinc UL is 40 mg in U.S. and 25 mg in EFSA . </Li> <Li> Acceptable Macronutrient Distribution Ranges ( AMDR ) , a range of intake specified as a percentage of total energy intake . Used for sources of energy , such as fats and carbohydrates . </Li> </Ul>
<Ul> <Li> Estimated Average Requirements ( EAR ) , expected to satisfy the needs of 50 % of the people in that age group based on a review of the scientific literature . </Li> <Li> Recommended Dietary Allowances ( RDA ) , the daily dietary intake level of a nutrient considered sufficient by the Food and Nutrition Board of the Institute of Medicine to meet the requirements of 97.5 % of healthy individuals in each life - stage and sex group . The definition implies that the intake level would cause a harmful nutrient deficiency in just 2.5 % . It is calculated based on the EAR and is usually approximately 20 % higher than the EAR ( See Calculating the RDA ) . </Li> <Li> Adequate Intake ( AI ) , where no RDA has been established , but the amount established is somewhat less firmly believed to be adequate for everyone in the demographic group . </Li> <Li> Tolerable upper intake levels ( UL ) , to caution against excessive intake of nutrients ( like vitamin A ) that can be harmful in large amounts . This is the highest level of daily nutrient consumption that is considered to be safe for , and cause no side effects in , 97.5 % of healthy individuals in each life - stage and sex group . The definition implies that the intake level would cause a harmful nutrient excess in just 2.5 % . The European Food Safety Authority ( EFSA ) has also established ULs which do not always agree with U.S. ULs . For example , adult zinc UL is 40 mg in U.S. and 25 mg in EFSA . </Li> <Li> Acceptable Macronutrient Distribution Ranges ( AMDR ) , a range of intake specified as a percentage of total energy intake . Used for sources of energy , such as fats and carbohydrates . </Li> </Ul>
vitamin d has an ai but not an rda . this means that
vitamin d has an ai but not an rda . this means that
no RDA has been established , but the amount established is somewhat less firmly believed to be adequate for everyone in the demographic group
no RDA has been established , but the amount established is somewhat less firmly believed to be adequate for everyone in the demographic group