Best Answer

From an online source:

Phosphorus is an important element for many essential processes in the body. In combination with calcium it is necessary for the formation of bones and teeth. Phosphorus is also involved in the metabolism of fat, carbohydrate and protein, and in the effective utilization of many of the B-group vitamins.
Phosphorus is very widely distributed in both plant and animal foods. Because of its widespread occurrence, it is unlikely that you will have any dietary deficiency. People with faulty kidneys could have a deficiency of phosphorus.

As for the other part of your question, not having enough phosphorus can lead to ketoacidosis in diabetics, where the body uses fat instead of sugars.

pH is important to prevent kidney stones and urinary tract infections. Keeping the urine acidic maintains bladder and kidney health, and eliminates stones. Extra phosphorous will help keep pH low and bind with Ca to eliminate stones.

Louie (1996-2013) answered on Mar 5th.