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Gas is a product of digestion that is made primarily of odorless vapors -- carbon dioxide, oxygen, nitrogen, hydrogen, and sometimes methane. The unpleasant odor is due to bacteria in the large intestine that release small amounts of gases containing sulfur. Everyone has gas and eliminates it by burping or passing it through the rectum. In many instances people think they have too much gas, when in reality they have normal amounts. Most people produce one to three pints of intestinal gas in 24 hours, and pass gas an average of 14 times a day.

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Archived: March 20, 2014

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