A few raw vegetables that do not cause gas are zucchini, bell peppers, asparagus, carrots and leafy greens, such as romaine lettuce, spinach and kale. A few raw fruits that do not cause gas are berries, tomatoes, cantaloupe and avocado.
Reduce gas by eating raw foods that are easily digested in the stomach. Zucchini is easy to digest and does not leave behind many residues that ferment in the intestines. A few other vegetables in the squash family are very similar, such as pumpkin and butternut squash.
Preparing salads with leafy greens is a way to reduce gas and have the fiber needed to aid in digesting other foods. Leafy greens can also be eaten cooked with little change to their effect on digestion. A few other types of leafy greens that are easy on digestion are iceberg lettuce, Boston lettuce, collard greens and Swiss chard.
Tomatoes are great to eat raw when trying to prevent gas, but they do not always prevent gas when cooked. Like other kinds of fruit, tomatoes contain fructose, which can be a factor in causing gas, so serving sizes should stay around 1/2 cup or smaller per meal. Tomato pastes and sauces should be avoided because most contain high-fructose corn syrup or other sweeteners that disrupt digestion.