Phosphorus, combined with oxygen, is present in the body in the form of phosphates. It is found in the highest proportion in the bones and striated muscle tissues, and in a very small proportion in nerve tissues and in the blood plasma as well. Phosphates play an important role in cellular metabolism and energy production, bone growth and metabolism, muscle and nerve function, and maintaining the body’s acid-base balance.
The body’s phosphate level is closely related to the level of calcium in the blood, which is regulated by the parathyroid hormone produced in the parathyroid gland, at the same time forming the body’s phosphate content.
Phosphorus enters the body with food, utilizes the amount absorbed from the intestines and excreted by the kidneys. Foods high in phosphorus include cereals (rye, wheat), legumes (beans, peas, lentils), dairy products, and red meats. However, convenience food and carbonated soft drinks contain a lot of phosphorus, which can contribute to excessive phosphorus intake, so it is advisable to reduce their consumption to maintain adequate calcium levels.