Coenzyme Q-10 can be found in every plant and animal cell. However if we lack this enzyme dietary intake will not alone be enough. We will need a supplemented form. Coenzyme Q-10 is a powerful antioxidant and helps to reduce free radicals. It is essential for good cardiovascular health. Our hearts need sufficient oxygen, and coenzyme Q-10 gives our cells the energy needed to pump oxygen to our hearts.