Hair restoration news – finasteride users are no stranger to potential side effects from the medication ranging from impotence, enlarged breast tissue, mood swings and more. Some suggest that part of the problem has to do with excess estrogen produced in our body while on finasteride. The hypothesis is that finasteride works by inhibiting the conversion of testosterone to DHT and the excess testosterone is then converted into estrogen as a result. If you are on finasteride for hair loss, you should know that there are things you can do to lower or reduce excess estrogen in your body. Click Reduce Excess Estrogen Naturally for details.