Minor minerals (trace elements): sulfur, iron, chlorine, cobalt, copper, zinc, manganese, molybdenum, iodine, and selenium.
Trace minerals are needed in very small amounts: recommended daily intake is in milligrams (mg) or micrograms (mcg) per day.
Trace minerals are needed in very small amounts (recommended daily intake, milligrams (mg) or micrograms (mcg) per day:
- iron, Fe (15 mg) - metal, found in nearly all living organisms;
- zinc, Zn (8 - 11 mg) - metal, essential for humans and other organisms;
- manganese, Mn (5 mg) - metal, toxic essential trace element;
- fluorine, F, fluoride ion, F− (3 - 4 mg) - a beneficial poisonous element, essential for bone solidity;
- copper, Cu (2 mg) - metal, essential to all living organisms;
- iodine, I (150 mcg) - a key component of thyroid hormones;
- selenium, Se (35 mcg) - toxic in large doses, essential micronutrient for animals;
- chromium, Cr (30 mcg) - chromium (III) is questionably essential for humans.