Coenzyme Q10 is a vitamin-like substance that is made naturally in the bodyCoenzyme Q10 is likely effective in alternative medicine as an aid in treating coenzyme Q-10 deficiency, or reducing the symptoms of mitochondrial disorders (conditions that affect energy-production in the cells of the body).Coenzyme Q10 is also possibly effective in preventing migraine headaches, lowering blood pressure, preventing a second heart attack, or slowing the progression of early Parkinson's disease. This medicine is also possibly effective in improving symptoms in people with congestive heart failure, nerve problems caused by diabetes, Huntington's disease, muscular dystrophy, or macular degeneration (age-related vision loss).