Adequate Intake (AI) is a dietary guideline used to help individuals understand the necessary nutrient levels for good health. It is established when there is not enough scientific evidence to determine a specific Recommended Dietary Allowance (RDA). AI provides a target intake based on observed or experimentally determined estimates of nutrient intake by healthy individuals. The AI is set for various nutrients, including vitamins and minerals, and serves as a useful benchmark for dietary planning. It helps ensure that people consume enough essential nutrients to maintain optimal health and prevent deficiencies, especially when precise recommendations are not available.