Introduction | Nutrient Reference Values
In the Recommended Dietary Intakes (RDI) for use in Australia intake of essential nutrients considered, in the judgement of the NHMRC, to be adequate to meet the known nutritional needs of practically all (Note that the US:Canadian terminology is 'Recommended Dietary Allowance', or 'RDA'). The RDAs are considered to be adequate to meet the known nutritional needs of A. all persons except the very young and very old. B. all persons except. The estimated average requirement (EAR) is the amount of a nutrient that is and an adequate intake (AI) is used instead of an RDA by the Food and Nutrition There are no known toxic effects of oral pantothenic acid in humans or animals. are quantities believed to be sufficient to meet the needs of most individuals.
Recommended dietary allowance (RDA)
In other cases, the AI was derived from the lowest level of intake at which all subjects in an experimental study met the criterion of adequacy; this is different from and generally lower than the group mean intake that is consistent with all subjects meeting the criterion of adequacy. The AI was sometimes estimated as an approximation of intake in a group with knowledge of actual requirements of only a few individuals.
The methods of derivation of the AI may differ substantially among nutrients and among life stage groups for the same nutrients; it follows that interpretation and appropriate use of the AI must differ also.
In TableAIs that represent estimates of desirable group mean intakes are identified.
Note that the indicators of adequacy are not always indicators of a classical nutrient deficiency state; in some cases they also include factors that may be directed to decreasing risk of chronic, degenerative diseases. Following, and shown in detail in Appendix Fare some examples of nutrients with an AI and the basis for their derivation: For infants the AI is a direct estimate of a suitable intake based on average content of human milk for an assumed volume of intake.
For adolescents and adults the AI is an approximation of the calcium intake that would be sufficient to maintain desirable rates of calcium retention, as determined from balance studies, factorial estimates of requirements, and limited information on bone mineral content and bone mineral density IOM, The AI is a value that appears to be needed to maintain —in a defined group with limited, but uncertain, sun exposure and stores—serum hydroxyvitamin D above the concentration below which vitamin D deficiency rickets or osteomalacia occurs.
What are Dietary Reference Intakes? - Dietary Reference Intakes - NCBI Bookshelf
This concentration is rounded to the nearest 50 IU and then doubled as a safety factor to cover the needs of all people regardless of sun exposure. As new information or processes develop, reference intakes will be periodically reassessed in keeping with this evolving process.
Recommended Dietary Allowance The Recommended Dietary Allowance RDA is the average daily dietary intake level that is sufficient to meet the nutrient requirement of nearly all 97 to 98 percent healthy individuals in a particular gender and life stage group life stage considers age and, when applicable, pregnancy or lactation.
The EAR is the daily intake value of a nutrient that is estimated to meet the nutrient requirement of half the healthy individuals in a life stage and gender group.
Before setting the EAR, a specific criterion of adequacy is selected, based on a careful review of the literature. When selecting the criterion, reduction of disease risk is considered along with many other health parameters.
Definition and Applications - Recommended Dietary Allowances - NCBI Bookshelf
The RDA for a nutrient is a value to be used as a goal for dietary intake by healthy individuals. The RDA is not intended to be used to assess the diets of either individuals or groups or to plan diets for groups. The AI is based on observed or experimentally determined estimates of nutrient intake by a group or groups of healthy people. For example, the AI for young infants, for whom human milk is the recommended sole source of food for the first 4 to 6 months, is based on the daily mean nutrient intake supplied by human milk for healthy, full-term infants who are exclusively breastfed.
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The main intended use of the AI is as a goal for the nutrient intake of individuals. Other uses of AIs will be considered by another expert group.
Tolerable Upper Intake Level The Tolerable Upper Intake Level UL is the highest level of daily nutrient intake that is likely to pose no risk of adverse health effects to almost all individuals in the general population.
The term tolerable intake was chosen to avoid implying a possible beneficial effect. Instead, the term is intended to connote a level of intake that can, with high probability, be tolerated biologically. The UL is not intended to be a recommended level of intake.