Hi Michael,<br> <br> We've spent a lot of time and resources on developing our Andropause Center and I encourage you and others to read the great material there. Your questions can be answered here:<br> <a href="http://www.seekwellness.com/andropause/testosterone.htm#agechanges" target="_blank">http://www.seekwellness.com/andropause/testosterone.htm#agechanges</a><br> <br> <a href="http://www.seekwellness.com/andropause/testosterone.htm#feelingbetter" target="_blank">http://www.seekwellness.com/andropause/testosterone.htm#feelingbetter</a>