The RDA stands for Recommended Dietary Allowance in nutrition. It represents the daily intake levels of essential nutrients considered sufficient to meet the needs of most healthy individuals in a specific age and gender group. The RDA guideline is used to help prevent nutrient deficiencies and promote overall health. It varies for different nutrients and populations, ensuring that dietary recommendations are tailored to individual needs. Understanding the RDA can help individuals make informed dietary choices to maintain optimal health and support bodily functions effectively.