Recommended Daily Intake (RDI) is a number associated with the daily intake of nutrients that are recommended for an average healthy person. The RDI of a nutrient may vary according to age, sex, weight, and other factors. Synonyms for RDI include Dietary Reference Intake, Daily Reference Value, Recommended Nutrient Intake, and Daily Value. These terms are essentially used for nutrition labels on food products and dietary supplements to ensure that consumers can easily understand the nutritional benefits and drawbacks of a product. Understanding the RDI of various nutrients can help individuals make informed choices about their diet and maintain a balanced and healthy lifestyle.