A healthy person excretes an average of 1.5 liters of urine daily. However, its amount is affected due to some reasons. For example, if the amount of food fluid is high, the amount of urine only increases and if the amount of sweat in the body is more, the amount of urine decreases. Diseases such as diabetes and nephritis affect both the rate and level of urination. Some products increase the level of normal flow of urine. These products are known as diuretics or diuretics . Water , salt water , tea and coffee .