Shilajit is found primarily in the Himilayas; it is a resin that has been used in Ayurveda healing for many years. Rich in minerals, Shilajit enhances the reproduction of Leydig cells, which produce testosterone. As such, supplementing with Shilajit increases the amount of free testosterone, overall testoersone and DHEA (Dehydroepiandrosterone) in the body. This can help with treating infertility and other health problems associated with low testosterone levels.