In the shape of salt of phosphate of calcium it is the main frame of the bones and of the teeth.

In his activity of production of ATP, it serves to store energy in the human body.
The phosphorus takes part in the contraction of the muscles, in the functioning of the kidneys, and in the regularity of the beats of the heart and the nervous conduction.

Most of the absorbed phosphorus of the food is realized in the top part of the small intestine. In this absorption he competes with the iron, the magnesium and the acid fítico, then it is excreted in the shape of phosphate by the urine to support a balance that is regulated by the paratohormona.

The principal origin of the phosphorus in the diet is associated with the proteins and the calcium of the such food like the meat the fish and the milk food. As it the calcium and the phosphorus usually have the same food sources.

The integral cereals contain more phosphorus that the refined ones, but on having contained fitina, his absorption sees blocked.

Other sources (fruits and vegetables) contain small phosphorus quantities.

It is very difficult to find an absence of phosphorus since it is usually in sufficient quantities in the food and is absorbed by big facility. There can have problems the persons who take antacids with aluminum, the renal patients, and affected of malabsorción syndromes.

His absence can produce muscular weakness, lacking in appetite and pains of bones.
It is not easy to find phosphorus excess for the regulation of the paratormona.

The needs for phosphorus are between 200 mg on the day of the nursing ones, 900 mg in the growth and 700 mg of the adult.