Normal range quantities of the element in the body

An adult body contains approximately 25 g magnesium, with 50% to 60% present in the bones and most of the rest in soft tissues. Less than 1% of total magnesium is in blood serum, and these levels are kept under tight control. Normal serum magnesium concentrations range between 0.75 and 0.95 mill moles (mmol)/L.

These are the recommended daily requirements of magnesium:

Children:

1 - 3 years old: 80 milligrams

4 - 8 years old: 130 milligrams

9 - 13 years old: 240 milligrams

14 - 18 years old (boys): 410 milligrams

14 - 18 years old (girls): 360 milligrams

Adult females: 310 - 320 milligrams

Pregnancy: 350 - 400 milligrams

Breastfeeding women: 310 - 360 milligrams

Adult males: 400 - 420 milligrams