http://www.DrKrupka.com Dr. Patrick Krupka takes a look at male hormones from a functional medicine perspective. He explains the implications of testosterone, DHEA, estrogen, DHT, pregnenolone, androstenedione, cortisol, progesterone, and cholesterol in male hormone balance and low testosterone or "low T". Before you consider bioidentical hormone replacement, or supplemental testosterone, you should understand the functional medicine approach to assessing male hormones. You can also check out his books on Amazon at http://www.amazon.com/author/drkrupka