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| | Gas in the Digestive Tract (Site not responding. Last check: 2007-11-04) |
 | | Gas is made primarily of odorless vapors—carbon dioxide, oxygen, nitrogen, hydrogen, and sometimes methane. |
 | | The sugars that cause gas are raffinose, lactose, fructose, and sorbitol. |
 | | In addition, to determine if someone produces too much gas in the colon or is unusually sensitive to the passage of normal gas volumes, the doctor may ask patients to count the number of times they pass gas during the day and include this information in a diary. |
| digestive.niddk.nih.gov /ddiseases/pubs/gas/index.htm (2160 words) |
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