Serum Uric Acid level test measures the amount of uric acid in the blood. Uric acid is a waste product that's created when the body breaks down substances called purines, found in certain foods and drinks. Normally, uric acid is dissolved in the blood, passes through the kidneys, and is excreted in urine. High levels of uric acid in the blood, known as hyperuricemia, can lead to gout, a form of arthritis that causes painful inflammation in the joints. It can also indicate kidney problems or the risk of developing kidney stones. This test is useful for diagnosing gout, monitoring kidney function, and assessing the risk of kidney stones.