CPK testing: CPK can be tested in the blood. No fasting is needed, it is a routine blood draw. CPK is released into blood by muscles when they are injured. A car accident, running a marathon, dehydration or certain types of conditions that affect muscles elevate the CPK level. Muscle pains and twitches are best evaluated for by electrolyte and thyroid hormone levels.
Answered 9/29/2016
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