Part of hemoglobin, which carries oxygen to cells. Part of myoglobin, which makes oxygen available for muscle contraction. Needed for use of energy by the cells. Anemia, fatigue, muscle weakness, headaches, pale skin, inability to concentrate. Needed to release energy from food.
Helps relax muscles after contraction.
Helps resist tooth decay. Needed for transmission of nerve impulses. Confusion, nervousness, disorientation, hallucinations. Muscle weakness can progress to convulsions, and ultimately tetany. Aids in building strong bones and teeth.