Question: what is the difference between ubiquinol and ubiquinone?
Answer: Ubiquinol is the “reduced” form of CoQ10, whereas ubiquinone is the “oxidized” form of CoQ10 (source). ... Lifestyle choices such as smoking can also reduce the levels of CoQ10 in the circulation. Ubiquinone has been available as a supplement for many years, but ubiquinol supplements were only introduced more recently.