[Sportsmedjosh]

• Estimated Average Requirements (ERA): Average levels of daily nutrition intake to meet the requirement of one half of the healthy individuals in a particular life stage and gender group. In addition to assessing nutrition adequacy on intakes population groups, the ERA provides a useful value for determing the prevalence of inadequate nutrition intake by the proportion of the population with intakes below this value
  
  
• Recommended Dietary Allowance (RDA): The average faily nutrient intake level sufficient to meet the requirements of nealy all (97% to 98%) healthy individuals in a particular life stage and gender group. For most nutrients, this valus represents the ERA plus two standard deviations of the requirement.
  
  
• Adequate Intake (AI): The AI provides a nutritional goal when no RDA exists. It represents a recommended average daily nutrient intake level based on observed or experimentally determined approximations or estimate of nutrient intake by a group (or groups) of apparently healthy people that are assumed to be adequate; the AI is used when an RDA cannot be determined. Low risk exists when intake is at or above the AI level.
  
  
• Tolerable Upper Intake Level (UL): The highest average daily nutrient intake level likely to pose no risk of adverse health effects to almost all individuals in the specified gender and life - stage rup of the general population. As intake increases above the UL, the potential risk of adverse effects increases.