Phosphorus is an important element forming proteins, nucleic acid and bone stock. Phosphorus compound takes part in energy exchange (adenosinetriphosphoric acid and phosphocreatine are energy accumulators). Muscle and mental activities, organism support are connected with the phosphorus transformation. Phosphorus influences heart and kidneys activity.

Adult need in phosphorus is 1200 mg/day (1.2 g). For healthy nutrition it is important not only absolute number of phosphorus but its correlation to calcium (2:3). Excess of phosphorus causes calcium excretion out of bones, excess of calcium causes urolithiasis.

Phosphorus can be found in fish, bread, meat, milk, cheese, beans, peas, oat, pearl barley, berries, nuts, cabbage, carrots, garlic, spinach and parsley.