Multiple choice

Which of the following minerals is required for the normal functioning of thyroid glands?

  1. Phosphorus

  2. Iodine

  3. Sodium

  4. Calcium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Iodine is an essential component of thyroid hormones T3 (triiodothyronine) and T4 (thyroxine), which regulate metabolism, growth, and development. Iodine deficiency causes goiter (thyroid enlargement). Phosphorus is important for bones and ATP, sodium for nerve impulses, and calcium for bones and muscle function - but none are specifically required for thyroid hormone synthesis.

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