Hi Wannabebig: Sorry, but androgens pretty much can cause hair loss with susceptibility being due to the genes you inherited from mom and pop. Testosterone & its synthetic analogs are converted to dihyrotestosterone by the enzyme 5-alpha reductase which causes a reduction in protein synthesis by inhibiting adenyl cyclase in the hair bulb; the result is shorter and finer hair. As the hair growth cycle proceeds, the hairs continue to become smaller and finer and eventually fall out. Your genetics determine susceptibility-if you're not losing your hair by age 40 (or after 2-3 cycles) you're follicles are pretty resistant and you can be pretty safe your going to keep your mane.