Phosphorous – Uses, Benefits, Sources and Dosage Phosphorous is considered as essential constituent of human bones. It is important nutrient for the normal functioning of body. It makes about 1% of our total body weight. It is found in the every cell of our body and plays an important role in the body functions. It supports the body to uitilise fats, proteins and carbohydrates for repair and maintenance of cells. Being a part of nucleoproteins, it regulates cell division and