An alkaline phosphatase (ALP) test measures the amount of ALP in your blood. ALP is an

enzyme found throughout the body, but it is mostly found in the liver, bones, kidneys, and

digestive system. When the liver is damaged, ALP may leak into the bloodstream. High

levels of ALP can indicate liver disease or bone disorders.The test is done with a blood

sample. A needle is used to draw blood from a vein in your arm or hand.