Question:medium
What is the recommended dietary allowance (RDA) of iodine during lactation, in micrograms per day?
What is the recommended dietary allowance (RDA) of iodine during lactation, in micrograms per day?
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Adult 150, pregnancy 220, lactation is the highest at 250 mcg/day.
Updated On: Jun 24, 2026
- 150
- 220
- 100
- 250
Show Solution
The Correct Option is D
Solution and Explanation
Step 1: Rank iodine needs from lowest to highest: non-pregnant adult, then pregnant, then lactating, since milk secretion adds an extra drain.
Step 2: This gives $150$ mcg for adults, $220$ mcg in pregnancy, and the highest figure, $250$ mcg, during lactation.
Step 3: Matching to the options, the lactation value is $250$ mcg. The $220$ figure is the pregnancy value and $150$ the baseline adult value, while $100$ is below requirement.
\[\boxed{250\ \mu g}\]
Step 2: This gives $150$ mcg for adults, $220$ mcg in pregnancy, and the highest figure, $250$ mcg, during lactation.
Step 3: Matching to the options, the lactation value is $250$ mcg. The $220$ figure is the pregnancy value and $150$ the baseline adult value, while $100$ is below requirement.
\[\boxed{250\ \mu g}\]
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