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The Dietary Reference Intake is a program of nutritional recommendations consisting of four values for each nutrient. Adequate intake is a recommended daily intake level assumed to be satisfactory for most people, while Tolerable Upper Intake Levels warn against excessive supplementation.
The adequate intake is a specific component of the dietary reference intake. Initiated in 1997 by the US National Academy of Sciences, the Dietary Reference Intake is a program of strategic nutritional recommendations, consisting of four specific values for each nutrient that, when followed, result in adequate nutrition for the most people. The four recommendations that constitute the Dietary Reference Intake are the Estimated Average Requirements, the Adequate Intake, the Tolerable Upper Intake Levels, and the Recommended Diets. Based on experimental data and approximations of the intake of healthy individuals, the adequate intake is a recommended average daily intake level of a nutrient given that is assumed to be satisfactory.
Estimated average requirements, calculated from data obtained in a review of the scientific literature, are designed to meet the dietary needs of at least 50 percent of people in a given age group. Determined only when there is inadequate evidence to establish an estimated average requirement, an adequate intake is expected to meet or exceed the amount needed to maintain normal growth or the maintenance of certain circulating levels of a nutrient in virtually all members of a demographic group specific healthy. It is established as a suggested guide for an adequate level of intake of a nutrient. In most cases, the adequate intake level exceeds the amount that would have been established experimentally. With certain nutrients that can be potentially toxic in large amounts, Tolerable Upper Intake Levels warn against excessive supplementation, while Recommended Diets indicate levels of a nutrient that the Food and Nutrition Board considers sufficient for more than 95 percent of average people in each demographic group
In dietary reference intake reports, adequate intake levels are estimated using a number of different tactics. Some adequate intake levels are established by looking at the average nutrient intake of people who meet certain health criteria. Since data is collected in various ways, and the Adequate Intake is derived from various formulas, it is difficult to make broad statements regarding the diet of a population using the Adequate Intake value. When the adequate intake is directly based on the consumption levels of healthy groups, it is valid to assume that nutrient consumption in other groups that matches or exceeds that of the reference group is adequate.
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