I did some research on my own and decided to try AB Ubiquinol CoQ10. I am using another product of AB and have been happy with it. This may sound hokie, but I noticed on the 2nd day how I felt more energy and was doing more and realized that it had happened on the first day. I'm a believer, especially, coming off a vacation in which I thought I had packed the Ubiquinol and did not. I didn't have the energy and was tired a lot. Now, I do not know if this is what is suppose to happen. It does for me.