Dietary Reference Intakes (DRIs) are a set of guidelines developed to inform nutritional needs for different populations and age groups. They are established to help prevent deficiencies, avoid chronic diseases, and minimize excessive intakes that could lead to toxicity. DRIs include several components such as Recommended Dietary Allowance (RDA), Adequate Intake (AI), Tolerable Upper Intake Level (UL), and Estimated Average Requirement (EAR).