Phosphorus is a mineral found in 85% in the skeleton and teeth in combination with calcium. The remaining 15% are found in the serum and being distributed by all cells. This mineral is essential in bone development, muscle contraction, blood clotting and is also responsible for maintaining a normal heart rhythm.
What is the dosage?

The recommended minimum dose is 700 mg. daily during pregnancy.

Should I take a supplement?

With a healthy, balanced diet you get the amount of phosphorus required by the body, so you do not need any supplements. Also keep in mind that the intake of phosphorus should be similar to that associated with calcium and vitamin D, so your body can assimilate properly. Dairy products are an ideal food because they contain a natural balance between phosphorus and calcium.
What foods contain phosphorus?

There are several foods that contain a good amount of phosphorus. Dairy products are a good example along with fish such as salmon, tuna and sardines, beef and liver. Also found in rice, lentils, nuts, hazelnuts, cashews, almonds, garlic, cabbage, spinach, lettuce, onion, carrot, celery, tomato, cucumber, sweet potato, artichoke, leek, strawberries, apples and plums.
What could be symptoms of deficiency?

Deficiencies in phosphorus (hypophosphatemia) are very rare and can only be seen in cases of malnutrition. Manifested primarily by symptoms such as muscle weakness, bone disorders, osteomalacia and rickets.