Phosphorus helps to build strong bones, teeth, cells and tissues. It also helps to release energy from carbohydrates, proteins, and fats.Protein foods are rich in phosphorus, so deficiencies are rare.
Symptoms of phosphorus deficiencies; loss of appetite, anxiety, bone pain, fragile bones, stiff joints, fatigue, irregular breathing, irritability, numbness, weakness, and weight change.
Iron helps make hemoglobin, the substance, in red blood cells that carries oxygen to all parts of the body. You blood cannot carry enough oxygen to your cells, without iron.
Not having enough iron can lead to iron-deficiency anemia, having too few red blood cells. people with anemia often have symptoms like; fatigue, weakness, shortness of breath, and are pale. They may even feel cold.
People who are deficiency may have unusual appetite for ice, clay, or other nonfood items. This is called pica. Pica normally goes away when the deficiency is fixed.