Which mineral and amino acid are directly required for thyroid hormone production?

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Multiple Choice

Which mineral and amino acid are directly required for thyroid hormone production?

Explanation:
The production of thyroid hormones relies on iodine and the amino acid tyrosine. Iodine is incorporated into tyrosine residues on thyroglobulin to form MIT and DIT, which then couple to yield the hormones T3 and T4. Without iodine, thyroid hormones can’t be made, and without tyrosine as the substrate there’s nothing to iodinate and couple. The other minerals listed don’t directly participate in thyroid hormone synthesis, and tryptophan isn’t used to make thyroid hormones. Dietary iodine (e.g., iodized salt, seafood) and tyrosine from protein-rich foods supply what’s needed.

The production of thyroid hormones relies on iodine and the amino acid tyrosine. Iodine is incorporated into tyrosine residues on thyroglobulin to form MIT and DIT, which then couple to yield the hormones T3 and T4. Without iodine, thyroid hormones can’t be made, and without tyrosine as the substrate there’s nothing to iodinate and couple. The other minerals listed don’t directly participate in thyroid hormone synthesis, and tryptophan isn’t used to make thyroid hormones. Dietary iodine (e.g., iodized salt, seafood) and tyrosine from protein-rich foods supply what’s needed.

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