Macro-, trace-, and ultratrace minerals in humans

* Macrominerals are defined as minerals that are required by adults in amounts >100 mg/day.
¶ Trace elements (or trace minerals) are usually defined as minerals that are required in amounts between 1 to 100 mg/day by adults.
Δ Ultratrace elements generally are defined as minerals that are required in amounts <1 mg/day by adults.