The Dietary Reference Intakes or DRIs are a list of recommended dosages of vitamins and supplements for different categorized groups, issued by the Institute of Medicine. DRI values are developed for different gender and age groups to ensure all people receive the correct amount of nutrients in their diets. DRIs apply to the healthy general population and provide a basis for a healthy lifestyle.
- Estimated Average Requirements (EAR): expected to satisfy the needs of 50% of the people in that age group.
- Reference Daily Intake (RDI): the daily dietary intake level of a nutrient considered sufficient to meet the requirements of nearly all healthy individuals in each stage and gender group.
- Adequate Intake (AI): where no RDI has been established, but the amount established is somewhat less firmly believed to be adequate for everyone in the demographic group.
- Tolerable upper intake levels (UL): to caution against excessive intake of nutrients that can be harmful in large amounts.