Have any preclinical (laboratory and animal) studies been conducted using coenzyme Q10?
Laboratory studies of coenzyme Q10 have focused on describing its chemical structure and how it works in the body. Animal studies have found that coenzyme Q10 stimulated the immune system and increased resistance to disease. Coenzyme Q10 helped to protect the hearts of animals given the anticancer drug doxorubicin, which can cause damage to the heart muscle. • Have any clinical trials (research studies in humans) been conducted with  coenzyme Q10? The promising results from animal studies of coenzyme Q10 and the anticancer drug doxorubicin led researchers to test coenzyme Q10 in a randomized clinical trial with 20 patients. (A randomized clinical trial is a study in which the participants are assigned by chance to separate groups that compare different treatments; neither the researchers nor the participants can choose which group.) The researchers examined whether coenzyme Q10 would protect the heart from the damage caused by doxorubicin. The results of this trial and others have
