Creatine Kinase (CK)

Creatine Kinase (CK or CPK) is an enzyme found primarily in heart muscle, skeletal muscle, and the brain. Elevated levels typically indicate muscle damage (e.g., from strenuous exercise, injury, certain medications like statins, or muscle diseases) or, less commonly, heart attack. Baseline levels vary, but significant elevations warrant investigation. CK levels can vary significantly based on physical activity and muscle mass. Always refer to the specific reference range provided by the testing laboratory.