A protein-rich diet that includes milk and milk products, eggs, fish, and meat may enough to meet the body's nutritional phosphorus requirements. Phosphorus is required by the kidneys in order for them to filter wastes properly. If the waste buildup becomes too great, this toxic material can be released into the blood stream where it can cause serious problems for organs such as the heart and brain. The human body contains approximately one third of its weight in proteins. Proteins are composed of amino acids which are in turn made up of carbon, hydrogen, oxygen, nitrogen, and phosphorus. The human body cannot produce any phosphorus on its own; it must obtain its needs from the food we eat. The two main forms of dietary phosphorus are inorganic and organic. Inorganic phosphorus includes phosphate salts such as calcium phosphate (apatite), sodium phosphate (monopotassium diphosphate or MKP), and aluminum phosphate (hydroxyphosphate). Organic phosphorus consists of phosopholipids found in cell membranes and nucleic acids DNA and RNA. Eating a diet rich in whole grains, vegetables, fruits, legumes, nuts, olive oil, and fish can help ensure we get enough phosphorus.