I would like to offer a bit of background. I have spent the past 25 years researching and studying testosterone. I have done clinical studies, conducted large-scale trials, performed hundreds of tests on people to establish its effectiveness, and made a lot of money off of it. For my last book (available from Amazon and Barnes and Noble) I did a huge study on what effects testosterone had on the prostate cancer patients in that book, and this has been a major focus of my research over the past 25 years. In addition to my clinical work, I have worked with many physicians on testosterone, and have developed and tested a very comprehensive protocol for hormone therapy. I am very aware that testosterone is not always effective, and I think it is important for doctors to know this. There are other products available that don't work as well, but don't cause side effects, and some work really well. As a doctor, I have tried all sorts of hormones, including those I have been recommending for decades, as well as natural products like herbs and vitamins. In all cases, there are problems with the effects they have on the body, so there's no real benefit for a lot of people.