Ubiquinone is converted to ubiquinol in the body. It's true that all ubiquinone products are not equal. If you choose ubiquinone you need to make sure that you use a pharmaceutical grade product such as Qunol Ultra which is both fat and water soluble. I've read research papers on ubiquinone and ubiquinol (I'm a pharmacist) and the word is that there is no considerable difference in the two products but some ubiquinone products aren't as good as I mentioned previously. I have taken statin drugs for several years. I have felt tired all the time and could not sleep. I stayed up to the wee hours of the morning. My biological clock was messed up. I blamed it on my tinnitus. I had also read that tinnitus may be associated with a Coq10 deficiency and so I thought I would give this supplement a try. I've taken this product for a month now and Qunol Ultra has not made a significant improvement in my tinnitus but my biological clock is back to normal. I can sleep through the night and I'm up and ready to go at 7:30am. Previously, I was going to bed about 5am and getting up at 10:30-11:00am. So I definitely have a lot more energy. I'm so amazed with this product that I have my husband taking the med now since he too is taking a statin drug. He has developed a REM sleep disorder. He screams and yells and moves violently during his REM sleep stage (for over 6 years now) and wakes up feeling unrested. He has no memory of his sleep episodes. After taking Qunol Ultra for 2 nights he did not wake me again for the next 8 nights. After only 10 days taking this supplement it's too early to tell if this supplement will cure him but, he has noticed a change and I've definitely noticed a change in his sleep habits. I chose Qunol Ultra because it is a pharmaceutical grade product that is both lipid and water soluble. The softgels are "horse pills" as my husband calls them but, neither of us have difficulty in swallowing them. This is just my opinion of the product so you can take it for what it's worth but, for now, I will continue to take this supplement