Alkaline phosphate is a protein which is present in every tissue. Few tissues like bile ducts, liver, bones etc have high levels of alkaline phosphates (ALP). Its normal levels are 44-147 IU/L. High ALP can be due to liver disease, bone disease, anemia, bile obstruction, hyperparathyroidism, healing fractures, hepatitis, rickets, Osteoblastic bone cancers, Paget's disease, Osteomalacia, and use of some drugs. So, these are possible causes of high ALP levels.