Basically the intestinal lining becomes comprimised either by gluten/celiac, candida, improper imbalance of bacteria, ect and food proteins leak through into the bloodstream. Then the body sends out antibodies to fight off the invaders. This causes many food reactions that you might not normally have if you did not have leaky gut.
L-glutamine is good at healing this condition. There are others but I cannot remember them offhand. Once you heal leaky gut, be sure to replenish the good bacteria with a good quality human strain probiotic such as Natren.
http://z11.invisionfree.com/Health_411/ind...hp?showforum=43www.natren.com
www.customprobiotics.com