Ivan K, take a look at this blog. This Doc has quite a bit of information on the diet's impact on stress, depression, IBS and so on. She covers the science with humor and is quite easy to read. I'm sure you will find the info useful. Some recent posts note that many folks who know they are lactose intolerent are often gluten intolerent, too and don't know it. The impact of the two problems is evident but it's tough to ferret out that there's an interaction going on.