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Q.

Recommended Daily Iodine Intake By Age And Pregnancy Status

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Detailed Solution

The Recommended Dietary Allowance (RDA) for iodine varies significantly throughout a person's life. The requirement increases during periods of rapid growth and development. The recommendations are typically measured in micrograms (µg) per day.

The following are the RDAs as set by health organizations like the World Health Organization (WHO) and the U.S. National Institutes of Health (NIH):

  • Infants (0 to 6 months): 110 µg/day (This is an Adequate Intake, or AI)
  • Infants (7 to 12 months): 130 µg/day (AI)
  • Children (1 to 8 years): 90 µg/day
  • Children (9 to 13 years): 120 µg/day
  • Teens (14 to 18 years): 150 µg/day
  • Adults (19+ years): 150 µg/day
  • Pregnant Women: 220 µg/day
  • Breastfeeding (Lactating) Women: 290 µg/day

A typical quarter-teaspoon (about 1.5 grams) of iodised salt in the United States contains approximately 71 µg of iodine, which helps most adults easily meet their 150 µg/day requirement.

The significantly higher requirement for pregnant and breastfeeding women is critical. During pregnancy, the mother must consume enough iodine for both herself and her developing fetus, whose brain and thyroid gland are entirely dependent on her intake. During breastfeeding, the mother transfers iodine to the infant through her breast milk, which is vital for the baby's continued neurological development.

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