From: jarv 15/12/2000 13:29:41
Subject: farts post id: 187872
How come some people fart lots and some don't. How can you stop someone from farting all the time

From: caroline (Caroline) 15/12/2000 14:10:01
Subject: re: farts post id: 187892
Here's a story Dr. Karl wrote on farts quite a while ago.
Enjoy,


Caroline



FARTS


The average human breaks wind about 14 times per day, and releases a total of 500 mL (half a litre) via the anal route. (You need about 5 litres of air to blow up a balloon).


Each time you swallow some food, you also swallow about 3 ml of air. An apple has about 20 mL of air in it. So about two thirds of the gas in the gut comes in through the mouth. The remaining one third is generated by bacteria that live in our large intestine. The bacteria live off carbohydrates that our small intestine can't digest. These carbohydrates come from foods like beans, onions and brussels sprouts.


People who eat lots of beans can generate 170 mL per hour. Even just the act of eating an release gas from the anus.


This is because eating stimulates muscular activity in the gut, and the anus is part of the gut. The release of gas begins about one hour after the meal, and lasts for about half an hour.


Karl S. Kruszelnicki 1993


From: Zardoz ®
Subject: re: Farts

From
http://www.uptodate.com/patient_info/topicpages/topics/Digestiv/7452.asp"
Gas and bloating

DISORDERS AND FOODS ASSOCIATED WITH INCREASED GAS - As discussed above, the vast majority of people with gas-related complaints do not produce excessive amounts of gas. However, there are several conditions that may indeed lead to increased gas formation. The following sections will discuss some of the more common causes.

Aerophagia - Chronic, repeated belching usually results from habitual swallowing of large amounts of air (ie, aerophagia). Aerophagia is typically an unconscious process occurring with anxiety. The diagnosis is made after excluding other possible causes (such as gastroesophageal reflux disease). Treatment focuses on methods to help people refrain from swallowing excessive amounts of air, such as advising people to eat slowly without gulping, and avoid carbonated beverages, chewing gum, and smoking. Specific anti-anxiety treatment may also be necessary.

Foods that cause gas - As discussed above, several foods contain the carbohydrate raffinose, which is poorly digested and leads to gas production by the action of colonic bacteria. Common foods containing raffinose include beans, cabbage, cauliflower, Brussels sprouts, broccoli, and asparagus.

Starch and soluble fiber are other forms of carbohydrates that can contribute to gas formation. Potatoes, corn, noodles, and wheat produce gas while rice does not. Soluble fiber (found in oat bran, peas and other legumes, beans, and most fruit) also cause gas. Some laxatives contain soluble fiber and may cause gas, particularly during the first few weeks of use.

Lactose intolerance - Intolerance to lactose-containing foods (primarily dairy products) is a common problem. In Europe and the United States, lactose intolerance affects 7 to 20 percent in Caucasians (being lowest in those of northern European extraction), 80 to 95 percent among Native Americans, 65 to 75 percent of Africans and African Americans, and 50 percent of Hispanics. More than 90 percent of the population is affected in some regions in eastern Asia.

Lactose intolerance is caused by an impaired ability to digest lactose, the principle sugar in dairy products. Clinical symptoms of lactose intolerance include diarrhea, abdominal pain, and flatulence after ingestion of milk or milk-containing products.

Lactose intolerance can be diagnosed by a lactose breath test, in which a measured amount of lactose in consumed, and the amount of hydrogen in breath samples is measured. Treatment involves avoidance of dairy products that contain lactose and/or supplementation with the enzyme lactase, which is available in over-the-counter products. People who avoid dairy products should take calcium supplements, since dairy products are a valuable source of calcium.

Intolerance to other sugars - In addition to lactose and raffinose, some individuals may be intolerant to other sugars contained in foods. Two common examples are fructose (contained in onions, artichokes, and pears and in some fruit drinks or soft drinks where it appears as "high fructose corn syrup") and sorbitol (a sugar substitute contained in some sugar free candies and chewing gum).

Diseases associated with increased gas - A number of diseases can cause impaired absorption of carbohydrates (carbohydrate malabsorption), which can lead to increased gas. In addition to bacterial overgrowth described above, carbohydrate malabsorption can occur in patients with celiac disease (a disease caused by intolerance to a protein contained in wheat), short bowel syndrome, and those who have rare primary disorders of the enzymes needed to digest specific forms of carbohydrates.

Infections - Infections of the intestine are generally not a frequent cause of gas. However, infection with a parasite known as Giardia lamblia ("giardiasis") may cause abdominal discomfort, nausea, bulky stools, and carbohydrate malabsorption. Giardiasis occurs in people who ingest the cysts of the parasites, which are found in some rivers, streams, and wells.




From: Zardoz ®
Subject: re: fart

From
http://www.uptodate.com/patient_info/topicpages/topics/Digestiv/7452.asp"
Gas and bloating

SOURCES OF GAS - There are two primary sources of intestinal gas: gas that is ingested (mostly swallowed air) and gas produced by bacteria that normally reside in the colon (a process called fermentation).

Air swallowing - Air swallowing is the major source of gas in the stomach. Everyone typically swallows a relatively small amount of air when eating and drinking and with every normal swallow. Larger amounts of air may be swallowed when eating food rapidly, gulping liquids, chewing gum, or smoking.

Most swallowed air appears to be eliminated from the stomach by belching (or "eructation"), so that only a relatively small amount passes from the stomach into the small intestine. However, posture may influence how much air passes to the small intestine. In an upright position, most swallowed air tends to pass back up to the esophagus and be expelled through the mouth. On the other hand, in a lying position, swallowed air tends to pass into the small intestine. In addition, some of the oxygen and nitrogen within swallowed air may be absorbed through the walls of the GI tract into the blood.

Belching may be voluntary or occur unintentionally. Involuntary belching is a normal process that typically follows eating and results from the release of swallowed air after enlargement or stretching (distension) of the stomach. In addition, belching may increase with certain foods that relax the ring-shaped muscle (sphincter) around the lower end of the esophagus where it joins the stomach. Such foods include peppermint, chocolate, and fats.

Bacterial production - The normal colon provides a home for billions of harmless bacteria, some of which may actually promote the health of the bowel. The bacteria survive by consuming foods that are not digested in the upper portions of the intestine. Their preferred foods are carbohydrates (a general term that refers to sugar, starches, and fiber in foods). Carbohydrates are normally digested by the action of enzymes in the small intestine. However, certain carbohydrates are incompletely digested, leaving them available for the bacteria in the colon to digest. The by-products of bacterial digestion include carbon dioxide, hydrogen, and methane.

Some carbohydrates, such as raffinose, are not well digested, and therefore produce increased amounts of gas. Raffinose is contained in a number of vegetables such as cabbage, Brussels sprouts, asparagus, broccoli, and some whole grains. As a result, these foods tend to cause increased amounts of gas and flatulence in most people.

Another factor is variation among individuals in their ability to digest carbohydrates. A classic example is lactose, the major sugar contained in dairy products. Much of the world's adult population has a limited ability to digest lactose. Thus, consumption of large amounts of lactose by such people will lead to the production of gas often accompanied by cramping and diarrhea.

Certain diseases can also lead to difficulty digesting carbohydrates. One example is bacterial overgrowth, in which excessive amounts of bacteria are present in the small intestine. The bacteria compete with the body's efforts to digest carbohydrates, leading to excessive gas often with diarrhea and weight loss. Bacterial overgrowth can be seen in patients with a variety of underlying conditions, such as those who have undergone some forms of intestinal bypass surgery and those with disorders that can slow emptying of the intestines (such as diabetes mellitus).




From: CJW 15/12/2000 23:15:46
Subject: re: farts post id: 188085
The liquidity of the intestine and lower bowels will also increase farting. Presumably, when your bowels are more liquid, there is more room for fermentation etc. Stress and tiredness usually increases bowel liquidity, also working and drinking lots.

It is possible to eat huge quantities of beans and not fart (much).

I have to go along with the bacterial theory. It looks like the composition of bacterial colonies will change slowly over time - sometimes triggered by certain evil foods.

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