When is adequate intake (AI) used?

Adequate Intake (AI) is specifically used when there is not enough evidence to establish a Recommended Dietary Allowance (RDA) for a nutrient. The AI is established based on observed or experimentally determined estimates of nutrient intake by a group of healthy people. This allows for a guideline that helps individuals achieve sufficient intake of essential nutrients even when precise data is lacking.

In contrast, RDA values are set based on extensive research to cover the nutritional needs of most healthy individuals in a specific life stage and gender group. Therefore, AI serves as an alternative when the RDA cannot be reliably determined, ensuring that individuals still have a reference point for sufficient intake without risking deficiency.