Medline studies on the extract (silybin-phosphatidylcholine complex):
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?CMD=search&DB=PubMed
http://www.liversupport.com/studiesindex.htm
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?CMD=search&DB=PubMed
http://www.liversupport.com/studiesindex.htm