Yin Yang Huo is also known as horny goat weed.. The acrid, sweet and warn herb has been used in TCM  as Anti-inflammatory, anti-histamine  Anti-bacterial, anti-aging, etc. agent and to treat  impotence, spermatorrhea, frequent urination , forgetfulness, withdrawal, and painful cold lower back and knees, etc., as it tonifies the Kidneys, etrengthens the Yang, expels …