Check out http://www.innatehealthfoundation.org/5_c.htm
for a list of published research articles related to IBS, food allergies , etc. One of the articles from this page (http://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=ShowDetailView&TermToSearch=17967233&ordinalpos=2&itool=EntrezSystem2.PEntrez.Pubmed.Pubmed_ResultsPanel.Pubmed_RVDocSum)clearly shows the correlation between IBS symptoms and food allergies .