Severe stress on the heart can damage its muscle. When that happens, your heart releases certain enzymes -- a kind of protein-- into your blood. After a heart attack, the level of these enzymes can ...

Your doctor may recommend the creatine phosphokinase (CPK) test if there's a need to measure CPK enzyme levels in your blood. The cells in your body require this creatine kinase enzyme to generate ...

A new drug for acne, Aczone, was approved in July, but with a catch. The Food and Drug Administration said it would require that patients first be tested for an enzyme deficiency that could put them ...