And last but not least, if you have food intolerances, most notably an inability to digest lactose, then those foods can cause a negative reaction in your intestines, which manifests as foul-smelling gas as it leaves your body. Dairy (everything from milk to cheese—really anything made from cow’s milk) can cause your body to release foul-smelling flatulence, among other complications. If you lack the enzyme lactase, which breaks down lactose in food, you should avoid dairy products and instead opt for dairy-free options.
