Which trace element is essential for the synthesis of melatonin, a hormone that regulates sleep-wake cycles?

A Zinc ✓
B Copper
C Selenium
D Molybdenum

Explanation

Zinc is an essential mineral that plays a crucial role in many biological processes, including the synthesis of melatonin, a hormone that regulates sleep-wake cycles.

Source

Journal of Clinical Sleep Medicine
Minerals, and Trace Elements Minerals and Trace Elements Zinc and Sleep Regulation Hard MEDICAL Confidence: medium