Which of the following trace elements is essential for the proper functioning of the thyroid gland?

A Selenium ✓
B Chromium
C Molybdenum
D Copper

Explanation

Selenium is a trace element that plays a crucial role in the proper functioning of the thyroid gland, particularly in the conversion of thyroid hormone T4 to T3.

Mnemonic

Se = Secretion, for thyroid hormone secretion

Source

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