All people who have gone on a very strict Psoriasis diet for at least 5-6 months have seen their Psoriasis go away. But they have to stay on the diet for life. Since the lips are a smaller area, perhaps it would not take as long to see results. I do not know if people get better because the food they eat is not as toxic to system if it leaks out gut like in leaky gut syndrome. But it seems like this strict diet could be bypassed if the intestinal wall was thickened or formed a protective coating. And there are ways to do that.