Urine composition analysis mostly refers to routine urinalysis, which belongs to one of the three major routine clinical examinations. Urine composition analysis can reflect the body’s metabolic situation. Secondly, the nature and composition of urine can also be examined to clarify whether the specific gravity of urine is within the normal range, whether the pH of urine is acidic or alkaline, and so on, and this can be used as the basis for judging the disease. In addition, the color and transparency of the urine, as well as the condition of red blood cells, white blood cells and epithelial cells can also be examined to determine whether there is any abnormality. Abnormal urinalysis is usually a sign of kidney or urinary tract disease and requires medical attention. It is important to note that it is best to take the mid-morning urine for this test, as the results are more accurate.