CoQ10 is an important vitamin-like substance that helps provide energy to cells and is required for proper function of many organs and chemical reactions in the body. CoQ10 is an antioxidant. While CoQ10 is rare, statin drugs used to lower cholesterol can adversely affect blood CoQ10 levels. If you think you may be at risk of low CoQ10 levels, talk to your doctor about taking a CoQ10 supplement. For those on statin drugs, a daily CoQ10 supplement can be useful for promoting heart health and/or restoring normal CoQ10 levels. CoQ10 is a fat-soluble nutrient similar to the fat-soluble vitamins A, D, E and K, so be sure to take your CoQ10 supplement with a meal that contains dietary fat to promote optimal absorption.