The liver tears these coenzymes down and manufactures coenzyme Q10 out of their elements. Coenzyme Q10 belongs to afamily of coenzymes often known as coenzyme Q or ubiquinone and is usually found in human cells. Coenzyme Q10 (CoQ-10) is a vital antioxidant present in your heart, liver and kidneys. As an illustration if you're taking supplements rich in milk ...