Garlic, peppers, lentils. Probably onions too. I have never found what calms it down. The gas isn't usually painful, it's just annoying because a fart while upright can too easily become a shart. Most of the time inverting really helps release the gas without anything liquid and also lying on the right side often works. I haven't found anything that actually reduces the amount of gas. I'd love to hear it if someone has. The gas meds at the drug store don't do anything for me except make me feel kinda bad.