Most individuals produce nearly 1 pint (473 milliliters) of flatus (gas) daily. Passing gas 10 to 20 times per day is considered normal. Diets that consist of an abundance of carbohydrate-rich foods (such as beans) produce greater amounts of gas because a greater amount of undigested carbohydrates enter the large intestine. The mixture of different gases causes the characteristic odor associated with flatulence.