Which of the following trace elements is essential for the production of thyroxine, a hormone produced by the thyroid gland?

A Iodine ✓
B Chromium
C Molybdenum
D Fluoride

Explanation

Iodine is a critical component of thyroxine, a hormone produced by the thyroid gland that regulates metabolism.

Mnemonic

Iodine = IoDine, essential for thyroid hormone

Source

American Thyroid Association
Minerals and Trace Elements Endocrinology Thyroid Function Medium MEDICAL Confidence: high