What Can Cause a Low Ck

1) Low Muscle Mass The most common cause of low creatine kinase levels is muscle wasting (muscle atrophy) due to physical inactivity, illnesses, or old age [85].

What is a concerning CK level?

In a healthy adult, the serum CK level varies with a number of factors (gender, race and activity), but normal range is 22 to 198 U/L (units per liter). Higher amounts of serum CK can indicate muscle damage due to chronic disease or acute muscle injury.

When should I worry about creatine kinase?

If you have higher than normal CK-MM enzymes, it may mean you have a muscle injury or disease, such as muscular dystrophy or rhabdomyolis. If you have higher than normal CK-MB enzymes, it may mean you have an inflammation of the heart muscle or are having or recently had a heart attack.