1. Two tubes (100 mg) daily is a normal dose based on how low a man's testosterone level is to start.<br> <br> 2. I am looking at a an article that mentions a couple of studies comparing Testim to AndroGel. On page 6 of the following article, the second paragraph indicates that in a head to head study between Testim and AndroGel, "Testim produced<br> 30% higher testosterone levels with a similar safety profile when compared in this head-to-head study."<br> <br> <a href="http://www.medreviews.com/pdfs/articles/RIU_5suppl1_s34.pdf" target="_blank">http://www.medreviews.com/pdfs/articles/RIU_5suppl1_s34.pdf</a><br> <br> 3. I'm sure there are other factors but the only one I am aware of is the presence of certain other drugs in the system (statins, for example).<br>