
Farting is a natural bodily function, but excessive flatulence can be caused by dietary changes, underlying health conditions, or food intolerances. Diets that are high in fibre, for example, can lead to an increase in gas. As such, people who change their diet may notice an increase in flatulence, especially in the short term. However, it is important to note that farting too much can be a sign of an underlying health issue, and excessive flatulence can be controlled through changes to diet and lifestyle.
| Characteristics | Values |
|---|---|
| Farting frequency | Farting 5-15 times a day is normal |
| Causes of increased farting | Dietary changes, underlying health conditions, food intolerance, certain medications, stress, anxiety, depression, swallowing air, slow intestinal movement, constipation, high-fibre foods, dairy products, carbonated drinks, fermented foods, certain fruits, vegetables, grains, laxatives, childbirth |
| Solutions | Dietary and lifestyle changes, hydration, exercise, limiting carbonated drinks, reducing dairy intake, taking Lactaid, consulting a doctor |
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What You'll Learn
- High-fibre foods, such as beans, lentils, and grains, are hard to digest
- Dairy products can cause gas if you're lactose intolerant
- Carbonated drinks and fermented foods add gas and feed gut bacteria
- Fructans in onions, artichokes, garlic, and leeks cause gas and bloating
- Diet changes can cause short-term gas while your body adjusts

High-fibre foods, such as beans, lentils, and grains, are hard to digest
Farting is a natural part of digestion, and the average person farts between 5 and 15 times a day. However, frequent farting can be a sign of certain dietary or health issues. One of the main causes of excessive farting is the consumption of high-fibre foods, such as beans, lentils, and grains.
High-fibre foods are an essential part of a healthy diet, providing the body with essential nutrients. However, they can also be hard to digest, leading to increased flatulence. This is because the small intestine struggles to break down certain compounds in high-fibre foods, such as fibre itself and raffinose (a complex sugar found in beans and lentils). As a result, the bacteria in the large intestine have to work harder to break down these compounds, producing excess gas in the process.
Beans, lentils, and grains are well-known for their ability to increase flatulence. Beans and lentils, in particular, contain high levels of fibre and raffinose, a sugar that the human body does not process well. When these sugars reach the large intestine, they are broken down by bacteria, releasing gases such as hydrogen, methane, and sulphur. Sulphur is responsible for the unpleasant odour often associated with flatulence.
Grains, such as oats and wheat products, also contain high levels of fibre, as well as gas-making fructans. This means that bread, pasta, and wholegrains can also contribute to increased flatulence. Additionally, some wholegrains, such as wheat, barley, and rye, contain gluten, which can cause gas and bloating in people with gluten intolerance.
It is important to note that not everyone will experience excessive flatulence from consuming high-fibre foods. Individual tolerance varies, and some people may be able to tolerate these foods better than others. However, for those who are susceptible, introducing high-fibre foods slowly and gradually can help the body adjust and reduce the occurrence of flatulence.
In addition to high-fibre foods, other dietary factors can contribute to excessive farting. Dairy products, for example, can cause gas buildup in people with lactose intolerance. Fatty meats can also lead to smelly farts due to their high sulphur content. Changes in diet, such as suddenly increasing fibre intake or consuming sugar-free foods, can also disrupt the balance of gut bacteria and lead to temporary flatulence.
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Dairy products can cause gas if you're lactose intolerant
The symptoms of lactose intolerance include digestive discomfort, bloating, intestinal gas, nausea, vomiting, stomach pain, and cramping. These symptoms can vary in severity and may take up to a day or two to appear after consuming lactose. It's important to note that not everyone with lactose intolerance experiences the same symptoms, and some may be able to tolerate small amounts of lactose without issues.
If you suspect you are lactose intolerant, it is recommended to consult a healthcare professional for a proper diagnosis before removing dairy products from your diet. They may suggest a lactose-free diet or gradually reintroducing lactose to monitor your body's response. Additionally, experimenting with different types and amounts of dairy products can help determine your personal lactose threshold.
To manage lactose intolerance, limiting dairy intake is often suggested. However, it is important to ensure adequate calcium and vitamin D intake through supplements or dietary alternatives. Lactase substitutes and probiotics may also help improve lactose tolerance.
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Carbonated drinks and fermented foods add gas and feed gut bacteria
Carbonated drinks can cause you to swallow extra air, which gets trapped in your GI tract. This air eventually has to be released in the form of gas. Fizzy drinks also contain gas, and drinking a lot of them will make you burp and fart more. Beer is another carbonated beverage that can lead to excess gas and bloating in the gut.
Fermented foods are often associated with vegetables and dairy products, but they can also be made with grains, fruits, and even meat. They are known for their numerous health benefits, including improved digestion, increased nutrient absorption, and a stronger immune system. Fermented foods are also a great source of probiotics, which are live microorganisms that promote gut health.
The fermentation process causes the release of gaseous by-products, including carbon dioxide, hydrogen, and methane. These gases can cause the intestines to stretch, leading to bloating and discomfort. If the food is not adequately broken down in the stomach and small intestine, it can reach the large intestine undigested, where gut bacteria will ferment it further, contributing to gas production.
Some common culprits of bloating and gas include beans, lentils, broccoli, cabbage, and onions. These foods contain complex carbohydrates that are difficult for the body to break down, leading to increased gas production. Individuals who experience excessive farting when consuming fermented foods are likely to have an overgrowth of gas-producing gut bacteria, which can be exacerbated by certain types of food.
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Fructans in onions, artichokes, garlic, and leeks cause gas and bloating
Fructans are a type of carbohydrate, or sugar, that some people have a hard time digesting. They are found in wheat, onions, and lots of fruits and vegetables. Fructans are a common trigger for people with IBS or sensitive digestion. They are poorly absorbed in the small intestine and when they reach the large intestine, they are rapidly fermented by gut bacteria, producing gas. Fructans also pull in water, which increases pressure in the colon, resulting in bloating, cramping, and sometimes diarrhea.
Onions, artichokes, garlic, and leeks all contain high levels of fructans, which are soluble fibres that may cause bloating. Fructans are also present in the white part of leeks, agave, wheat, and a range of other gas-producing foods. Leeks have laxative properties and help in relieving constipation. They are a natural diuretic, antiseptic, and anti-arthritic agent.
If you are prone to gas and bloating, it may be helpful to start paying attention to how certain foods make you feel. Keeping a food log or symptom journal can help you track what you eat and how your body reacts. A registered dietitian can help interpret your entries and identify subtle triggers.
There are also strategies to help minimize symptoms, such as using garlic/onion oil infusions, low fructan alternatives, or enzyme supplements. FODZYME is a blend of digestive enzymes specifically designed to break down common FODMAP triggers, including fructan.
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Diet changes can cause short-term gas while your body adjusts
Similarly, dairy products contain lactose, a sugar that can cause a buildup of gas. Around 65% of the world's adult population has some degree of lactose intolerance, and dairy can cause bloating and flatulence. Fatty meats are also problematic as they contain the amino acid methionine, which breaks down into hydrogen sulphide, causing a rotten egg smell.
Some people are susceptible to gas production from the fermentation of short-chain carbohydrates like fructose, found in honey, corn syrup and some fruits. A sudden switch to a high-fibre diet can also cause excessive flatulence, as fibre creates excess gas. High-fibre foods include grains, oats, wheat products, bread, pasta, and wholegrains. Green leafy vegetables, such as cabbage, broccoli, and kale, are also super-high in fibre and can cause gas.
Dietary changes can lead to short-term digestive disturbances, including nausea, an upset stomach, and constipation or diarrhoea. These issues should settle as the body adjusts to the new diet. If they persist, it may indicate a food intolerance. People with known intolerances can take specific digestive enzymes to help them digest trigger foods. For example, those with lactose intolerance can take lactase before eating dairy.
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Frequently asked questions
Dieting can cause short-term flatulence while your body adjusts to new foods. A sudden switch to a high-fibre diet, for example, can cause excessive gas.
Fatty meats, dairy products, beans, lentils, cruciferous vegetables, grains, carbonated drinks, and fermented foods are all common causes of flatulence.
If you are intolerant to lactose or gluten, try to limit or avoid foods that contain these ingredients. You could also try eating smaller portions more regularly and practising mindful eating to prevent swallowing excess air.











































