Clinical biochemistry is the area of clinical pathonology that is generally concerned with analysis of bodily fluids. The discipline originated in the late 19th century with the use of simple chemical tests for various components of blood and urine. Subsequent of enzyme activities, spectrophotometry, electrophoresis, and immunoassay. Clinical Biochemistry is on of the most rapidly advancing areas of laboratory and clinical medicine. The marked increase in the number and availability of laboratory diagnostic procedures has helped in the solution of clinical problems. Individual laboratory tests are rarely ordered and reported singly; usual combinations of lab tests are used. The physican should however be judicious in selecting the tests that really give a clue to the diagnosis of a disease. Some biochemical investigations however are done routinely for most patients, e.g. qualitative tests with urine. This book will serve as a handy material for the students as well as teachers, taking undergraduate and postgraduate courses. Students, who is appearing for various competitive exams, will find this book equally helpful.