What supplements would lower creatine kinase levels.?

None. No supplements will lower creatine kinase which signifies potential muscle breakdown when elevated. In past, we tested CK when we suspected a heart attack. Levels can also be elevated when muscles are damaged (rare condition = rhabdomyolysis). Check out http://labtestsonline.org/understanding/analytes/ck/tab/test/ & http://www.mayomedicallaboratories.com/test-catalog/Clinical+and+Interpretive/8336.