RDA stands for Recommended Dietary Allowance, which is a set of guidelines for the average daily intake of essential nutrients that is sufficient to meet the needs of nearly all healthy individuals in a particular age and gender group. The RDA is intended to provide a standard that can be used to plan and assess nutrient intake for individuals, and is set by the Food and Nutrition Board of the National Academy of Sciences.

RDAs are established for different nutrients, such as protein, vitamins and minerals, and they vary by age, gender, and life stage (e.g. pregnancy and lactation). The RDA is based on the average daily nutrient intake level that is sufficient to meet the nutrient requirements of nearly all (97%–98%) healthy individuals in a specific life stage and gender group.

It’s important to note that the RDA is not a goal for individuals to strive for, but rather a guide to help them make informed choices about the foods they eat and the supplements they take. It’s also important to keep in mind that the RDA is an average and may not be appropriate for people with special health needs or conditions. It’s always recommended to consult with a registered dietitian or a nutritionist for personalized advice and guidance on nutrient intake.