Figure 3 The Recommended Nutrient Intake (RNI) for iron given different levels of bioavailability of iron in the diet: 5%, low; 10%, moderate; and 15%, high. The RNI is based on the amount of iron necessary to meet requirements of 95% of the population for each age/sex group. Because typical iron intakes range from 10 to 15mg/day, iron requirements are nearly impossible to meet on low-bioavailability diets. (Data from the Food and Agriculture Organization of the United Nations (2001) Iron. In Human Vitamin and Mineral Requirements: Report of a Joint FAO/WHO Expert Consultation, Bangkok, Thailand, pp. 195-221. Rome: FAO.)
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