Coenzyme Q10, also called CoQ10, is an essential nutrient that helps cellular energy production. Low levels of CoQ10 have been associated with compromised immune function, gum disease and heart failure. It may also help reduce the frequency of migraine headaches and associated nausea and vomiting when taken as a prophylactic. Coenzyme Q10, 100 mg from Kirkland Signature is a high potency antioxidant and a key nutrient to slow aging.