What is Ashwagandha churna powder for?

on yahoo answers someone told me to mix this powder in milk and drink if i want my breast to grow. is this really possible? or is it bad for my health..im almost 17 by the way..What is Ashwagandha churna powder for?
Kindly click on the links below and read information regarding the plant =


http://en.wikipedia.org/wiki/Ashwagandha





http://www.zhion.com/herb/Ashwagandha.ht鈥?/a>





http://www.holistic-herbalist.com/ashwag鈥?/a>





http://www.holistic-herbalist.com/ashwag鈥?/a>





http://www.squidoo.com/ashwagandha-benef鈥?/a>





http://www.nutros.com/nsr-0204n.html





Thank you !