Normal range: 15-45 mmol/L
Comment: Reduced in some cases of primary hyperuricaemia, Xanthinuria, folic acid deficiency, lead toxicity, glomerular failure and thiazide diuretic therapy. Increased in gout, leukemia Lesch-Nyhan syndrome Wilson’s disease, cystinnosis, viral hepatitis, polycythemia
Sample: 24 hr urine