Alkaline Phosphatase, Bypass Surgery
Alkaline phosphatase (ALP) is an enzyme made in liver cells. Elevated levels of ALP can be caused by many types of liver damage, including hepatitis, cirrhosis, liver cancer or drug toxicity. Heart bypass surgery or blood transfusions can cause temporary drops in ALP; persistently low levels of ALP may be caused by zinc deficiency or a rare genetic bone disorder.

Stroke