I agree with teh_pwn completely. Eat healthier, and you'll feel better. What's not to love?
You don't have to go crazy. Just replace all white bread and pasta and rice with wheat bread, whole wheat pasta, brown rice (many people even prefer the taste after a while, since it HAS more taste). Eat less (takes a while for that feeling of hunger to go away when you start eating, which is why people eat way too much). Cut down on fried foods and sweets.
High fiber diets have so many health benefits. Plus you'll be more regular. Who doesn't want predictable, easy pooping?