I have done on page optimization and off page optimization for http://www.consumerhealthanswers.com . In off-page optimization, blog posting, article directory submission, document sharing sites and also done SMO Social Media Optimization i.e. facebook, twitter, stumbleupon, pinterest. Our content is pure not duplicate and i am not doing pure link building for this site. But after penguin update 2.0, my project ranking is drop and still not stable. For e.g. my keywords "Amberen" & "Amberen Reviews" is drops for this link http://www.consumerhealthanswers.com/amberen-reviewed.html why.