CoQ10 or coenzyme Q10 is an antioxidant largely responsible for your energy levels. As you age, your body produces less CoQ10, which is thought to be a major reason behind the gradual loss of energy past your twenties. This is because your body needs sufficient CoQ10 to convert food into energy. CoQ10 also prevents and decreases the risk of heart disease, reduces inflammation, fights gingivitis and improves cognitive function.