It's a multi-use supplement, used as an antioxidant among other things. My doctor had me take it because I had very high blood pressure and he said it could strengthen my heart as well as my whole cardiovascular system.
CoQ10 is naturally produced by the body but some medicines like statins for cholesterol will lower the normal amount in your body, so supplements are necessary. I know there is ongoing clinical research and I believe the lack of adequate CoQ10 has been linked to some diseases.
Actually COQ10 is not commericial available. We are incapable of developing COQ10 at this time. I know I have a child with Mitochondria Disease. I wish we could produce this product to pharmacy grade. It doesn't exist. It is a marketing scheme just like ATP which is Adesonine Tri-Phosphate. Your can buy ATP at the store but it is not the ATP you need to run your body.
Sorry if I burst anyone's bubble. It is snake oil youb are buying.