The phosphorus does not exist in the elemental state in the body but is in the form of phosphates, especially calcium, sodium, potassium and a variety of organic compounds. The adult human body contains about 700 g of phosphorus, about 85% are associated with calcium in the skeleton and teeth.

Intestinal absorption of phosphorus is not like that of calcium, an important step in controlling its plasma concentration. Indeed, the efficiency of absorption of phosphorus is generally high (50-80%) and varies little physiological factors and level of contribution. The average values are taken from 70 to 75% in children, adloscents and pregnant women, and 65% in adults and the elderly.

The kidney plays an important role in the regulation of phosphate, including the control of tubular reabsorption of phosphorus in the effect of parathyroid hormone.

Sources of phosphorus

See the list of foods that provide the most phosphorus


It seems prudent to keep a safety limit of 2.5 g Potssium per day, which corresponds to 330% in Nutrimeter ®. For the lower limit, it seems that it should not be below the value of 50% in the ANC Nutrimeter ®.

(Source: "Recommended dietary allowances for the French population," the CNERNA-CNRS. Edition coordinated by Ambroise Martin.)