If 1000 healthy 40-year-old men eat a daily diet supplying their _______________ of iron, then 500 of them, on average, will need to take supplemental iron to meet their physiological requirements.
Fill in the blank(s) with correct word
Question 2
Which trace mineral is thought to be needed for glucose homeostasis and insulin function in humans?
a. Iron
b. Magnesium
c. Iodine
d. Chromium