The alkaline phosphatase –serum test is also known as ALP. It helps to screen for liver damage or disease or bone disorder. It also helps to monitor ongoing treatment for liver damage or disease or bone disorder. It helps to detect the disease of the gallbladder. The alkaline phosphatase-serum test is done: • As a part of routine liver panel • In case of symptoms of liver disorder • In case of symptoms of bone disorder • In case of symptoms of gallstones and gallbladder diseases