Lamictal is a glutamate blocker.
We take in A LOT of glutamate in our diets. I am assuming that those that respond well to Lamictal can benefit from a diet low in glutamate. It's everywhere and hidden on food labels.
Some of the more obvious offenders are MSG (monosodium glutamate), soy sauce, aspartame. Here is a site with a lot of information and a HUGE list of foods to avoid. http://www.msgtruth.org/avoid.htm
I just went through the house and chucked everything with any of the ingredients (except some things that my SO loves, like Doritos). I'll have to remember what I can't eat.
Sometimes I dream of being free from medication AND symptoms. I am just learning how this works, but IF I can maintain a low glutamate diet for a long period of time, I want to talk with my Dr's about SLOWLY reducing my dose of Lamictal and seeing if symptoms appear.