flatulence : why do you fart,foods involved,what makes you fart, why you fat so much and when you hold in a fat where does it go?

Why do we fart?

We fart because there is gas in our intestines that we need to get out.

A small amount of swallowed air makes it into the intestines, but most of the gas there is produced by the bacteria that help to digest our food. This gas is expelled by burping and farting.

The gas is mainly hydrogen and carbon dioxide. The smell comes from sulphur compounds that are only present in trace amounts.

The nerve endings in your anus allow you to distinguish between a build-up of gas and a solid stool, so you can pass wind safely.

Does everybody fart?

Without exception. Gas ends up in the large intestine from air that is swallowed and from the action of the bacteria that live there. It is mostly nitrogen and carbon dioxide with some hydrogen and methane mixed in, with tiny amounts of skatole, indole, methanethiol, hydrogen sulfide and dimethyl sulfide to give it a stinky smell.

Everyone farts but some people take enough care with the release that they are rarely caught out. 

Why do I fart so much?

It's normal for some people to fart more than others. According to the NHS, the average person farts betweenbetween 5 and 15 times a day. However, there are a few conditions that can cause you to fart more than normal.

Farting is a symptom of both coeliac disease and lactose intolerance. As well as eating foods that are difficult for you to digest, excessive flatulence can be caused by constipation, irritable bowel syndrome, indigestion and gastroenteritis. It can also be a side effect of some medications.

If you hold in a fart, where does it go?

It stays right there! If you suppress a fart, it actually just seeps out more quietly, or you might be able to hang on until the next time you are on the toilet. But sooner or later, that fart is coming out! – 

What foods make you fart?

Beans, beans, they're good for your heart. The more you eat, the more you fart... or so the poem says. But why do beans make you fart, exactly

Beans, like many other foods, contain plenty of soluble fibre. While this is great for your health, it can also make you fart – soluble fibres are fermented in the colon, rather than being digested in the intestines. This produces gas, which becomes a fart.

Other fart-inducing foods include pulses, such as lentils and peas, brassicas including cabbages and broccoli, onions, prunes and apples.