Terranova CoQ10 Complex 30mg is an antioxidant that occurs naturally in some foods which some people also chose to take as a supplement. Antioxidants are thought to be important to help the body fight the damaging effects of particles called free radicals. These can affect DNA and cell membranes. Your body produces less and less CoQ10 as you get older, and some studies show that CoQ10 could potentially help with high blood pressure, age-related macular degeneration, and even chronic fatigue syndrome.