Functions

Phosphorus is combined with calcium in the bones and teeth. Eighty five percent of the phosphorus in our bodies is found in the bones. Phosphorus is one of the body's major substances used to control pH, and it is essential in energy production in the cell. It is also responsible for the production of genetic material, transmission of nerve impulses,

The absorption of phosphorus is regulated by parathyroid hormone, and excesses are secreted in the urine. A high phosphorus level may be seen in people with kidney failure, since the kidney loses part of its ability to properly excrete the excess.

Uses

May be used as a laxative, in bone problems such as osteomalacia osteoporosis and rickets.

Deficiency

Deficiency symptoms include weakness, loss of appetite, bone pain, joint stiffness, osteomalacia, irritability, numbness, pins and needles, speech disorders, tremor and mental confusion, anemia, possibly decreased resistance to infection. Deficiency is considered rare because phosphorus is widespread in food.

Antagonists

Phosphorus deficiencies may result from malnutrition, alcohol abuse, or starvation. Antacids containing aluminum may block absorption.

Dose

RDA Adults 700mg, pregnancy 1250mg

The RDA is based on an estimate for the preferable ratio (1:1) for calcium and phosphorus -- the diet is often as much as (1:2)!

Toxicity

High levels of phosphorus lead to calcium deficiency. There may be a relationship between high phosphorus level and the severity of coronary heart disease. High levels of phosphorus also decrease vitamin D levels which may increase the risk of bone disorders and cancer.

Sources

Sources of phosphorus include: meats (red, poultry, fish), eggs, legumes, milk and dairy products, soft drinks.