Jeffrey Salazar
Fibre is an essential part of a healthy diet. Most people do not get enough fibre, with only 5% of the population meeting the adequate intake recommendations. Fibre is a type of carbohydrate that the body cannot digest. It passes through the body and becomes food for the beneficial bacteria in the gut. This helps with digestion and prevents constipation. Fibre can also help manage weight, reduce the risk of heart disease, lower cholesterol and regulate blood sugar levels. It is important to get fibre from a variety of sources, including fruits, vegetables, whole grains and legumes.
| Characteristics | Values |
|---|---|
| Definition | Fibre is made up of the indigestible parts or compounds of plants, which pass relatively unchanged through our stomach and intestines. |
| Composition | Fibre is mainly a carbohydrate. |
| Types | Soluble and insoluble fibre. |
| Role | Fibre keeps the digestive system healthy. |
| Benefits | Fibre may help manage weight, prevent constipation, and enhance gut health. |
| Fibre may help reduce the risk of heart disease, type 2 diabetes, weight gain, obesity, and bowel cancer. | |
| Fibre may lower blood pressure and cholesterol levels. | |
| Fibre may help regulate blood sugar levels. | |
| Sources | Fruits, vegetables, whole grains, and legumes. |
| Daily Intake | Government guidelines recommend an intake of 30g of fibre per day for adults. |
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What You'll Learn
Fibre helps manage weight
Fibre is an essential part of a healthy diet, offering a range of health benefits, including weight management. Fibre is a type of carbohydrate that is made up of the indigestible parts of plants. It passes through our stomach and intestines relatively unchanged.
Fibre also helps manage weight by delaying the absorption of sugars from the intestines, helping to maintain lower blood sugar levels and preventing a rapid rise in blood insulin levels, which has been linked to obesity and an increased risk of diabetes. Fibre-rich diets are associated with a reduced risk of type 2 diabetes, which is often linked to unhealthy weight gain.
In addition, high-fibre foods tend to have a lower energy density, providing fewer calories per gram of food. This means that a person on a high-fibre diet can consume the same volume of food while taking in fewer calories.
Overall, increasing fibre intake is a healthy strategy for weight management, as it helps reduce appetite, slow digestion, and maintain healthy blood sugar levels, all of which contribute to maintaining a healthy weight.
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Fibre prevents constipation
Fibre is an essential part of a healthy diet. It is crucial for maintaining a healthy gut and reducing the risk of chronic illnesses. Fibre is made up of indigestible plant parts or compounds, which pass through the stomach and intestines relatively unchanged. It is mostly found in vegetables, fruits, whole grains, and legumes.
Fibre is well-known for its ability to prevent and relieve constipation. Constipation is characterised by difficult or infrequent bowel movements. It is a common problem, affecting about 20% of people annually. The standard advice for those experiencing constipation is to increase their fibre intake. This is because fibre adds bulk to the stool, making it easier to pass. Fibre also supports the gut microbiome and enhances gut motility, ensuring smooth coordination of muscle contractions in the intestines.
There are two types of fibre: soluble and insoluble. Most high-fibre foods contain both types. Insoluble fibre does not dissolve in water and passes through the gastrointestinal tract largely intact. It adds bulk to the stool and helps prevent constipation. Soluble fibre, on the other hand, dissolves in water and forms a gel-like substance in the digestive system. This gel acts as a natural stool softener, making bowel movements more comfortable. It also slows down stomach emptying, increasing the time one feels full.
While increasing fibre intake is often recommended for constipation, it may not work for everyone. Some studies suggest that reducing fibre intake can be more effective in relieving constipation. Additionally, for those who consume adequate fibre but still experience constipation, increasing fibre may even worsen the problem. In such cases, it is important to consult a gastroenterologist or dietitian to determine the underlying cause and receive appropriate treatment.
Overall, fibre is an important tool in the management of constipation. It helps to optimise digestive health and promote regular bowel movements. However, individual responses may vary, and personalised advice from a healthcare professional is always recommended.
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Fibre lowers cholesterol
Fibre is an essential part of a healthy diet, offering numerous health benefits. It is a carbohydrate found in plant foods, composed of indigestible parts or compounds of plants. Fibre is categorised into two types: soluble and insoluble. Both are beneficial to health and are usually found together in plant foods.
Soluble fibre dissolves in water, forming a gel-like substance in the stomach. This gel slows digestion, preventing blood sugar spikes. It also traps fats, preventing their absorption and, in turn, lowering cholesterol levels. Sources of soluble fibre include oatmeal, beans, lentils, and fruits.
Research has shown that soluble fibre reduces total blood cholesterol levels and LDL (low-density lipoprotein) or 'bad' cholesterol levels. High cholesterol levels can lead to fatty deposits along artery walls, narrowing them and increasing the risk of coronary heart disease. Soluble fibre binds bile acids, which are made from cholesterol for digesting dietary fats, and then excretes them, thereby lowering cholesterol levels.
For example, 3 grams of soluble fibre from oats can decrease total and LDL cholesterol by approximately 0.13 mmol/L. Consuming 2-10 grams of soluble fibre per day has been associated with small but significant decreases in total and LDL cholesterol.
Fibre is crucial for maintaining a healthy gut and reducing the risk of chronic health conditions. It is recommended that individuals consume at least 25 grams of fibre per day to promote better health outcomes.
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Fibre regulates blood sugar
Fibre is an essential part of a healthy diet. It is a carbohydrate that cannot be digested by the body. Fibre helps to keep the digestive system healthy and prevents constipation. It is also important for maintaining a healthy weight.
Fibre is particularly beneficial for regulating blood sugar levels. Soluble fibre dissolves in water and forms a gel-like substance in the stomach. This gel slows down digestion and the absorption of sugars from the intestines. As a result, soluble fibre helps to maintain lower blood sugar levels and prevent rapid increases in blood insulin levels, which have been linked to obesity and an increased risk of diabetes.
The viscosity of the gel is key to its effectiveness in regulating blood sugar. When the stomach contents are more viscous, they stay in the stomach for longer and move into the small intestine more slowly. This slows down the release of sugar into the bloodstream. Additionally, studies have shown that digestible carbohydrates break down into glucose at a slower rate when the gut contents are more viscous.
The role of fibre in blood sugar regulation is especially important for people with diabetes or prediabetes. Fibre helps with blood sugar control and can lower the risk of associated complications such as heart disease. A high-fibre diet is also protective against weight gain, as it increases feelings of fullness and reduces calorie intake.
Overall, including adequate amounts of fibre in the diet is crucial for maintaining digestive health and regulating blood sugar levels. Soluble fibre, in particular, has a significant impact on blood sugar regulation due to its ability to form a viscous gel in the stomach, slowing down the absorption of sugars.
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Fibre reduces risk of heart disease
Fibre is an essential part of a healthy diet. It is the indigestible part of plant foods, and most high-fibre foods contain both soluble and insoluble fibre. Fibre is important for keeping the gut healthy and reducing the risk of chronic health conditions, including heart disease.
Fibre reduces the risk of heart disease
Soluble fibre dissolves in water and forms a gel-like substance in the stomach. This gel slows down the emptying of the stomach and the transit time of food through the digestive system, making you feel full for longer. Soluble fibre also lowers cholesterol levels by binding bile acids made from cholesterol to digest dietary fats. When blood cholesterol levels are high, fatty streaks and plaques are deposited along the artery walls, which can lead to coronary heart disease.
Insoluble fibre does not dissolve in water and passes through the gastrointestinal tract relatively intact. It adds bulk to the stool, helping it pass through the gut more quickly and preventing constipation. Insoluble fibre also keeps calorie intake low as it takes longer to eat and digest.
A 2017 review of studies found that people eating high-fibre diets had a significantly reduced risk of cardiovascular disease and lower mortality from these conditions. Meta-analyses comparing the highest versus lowest dietary fibre intake reported statistically significant reductions in the relative risk of cardiovascular disease mortality, incidence of cardiovascular disease, coronary heart disease, and stroke.
Several studies have also found that fibre-rich diets may reduce the risk of heart attack and stroke by as much as 30%. Fibre-rich diets are thought to decrease inflammation, which may play a role in keeping blood sugar, blood pressure, and cholesterol levels in check, as well as helping to prevent harmful blood clotting.
Overall, increasing fibre intake is likely to reduce the risk of heart disease, lower blood pressure, and maintain lower blood sugar levels.
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Frequently asked questions
Fibre is a type of carbohydrate that the body cannot digest. It passes through the body and becomes food for the beneficial bacteria in our gut. Fibre can help manage weight, prevent constipation, and enhance gut health. It may also help reduce the risk of heart disease, lower blood pressure and cholesterol, and prevent certain cancers.
There are two types of fibre: soluble and insoluble. Most high-fibre foods contain both. Soluble fibre dissolves in water and forms a gel-like substance in the stomach. Insoluble fibre does not dissolve in water and passes through the gastrointestinal tract mostly intact. It adds bulk to the stool, helping to prevent constipation.
Fibre is mostly found in vegetables, fruits, whole grains, and legumes. Good sources of soluble fibre include oats, fruit, and nuts. To increase your fibre intake, choose whole grain alternatives to white bread, white rice, and white pasta. Eat starchy foods like potatoes with the skins on, and add pulses like beans, lentils, or chickpeas to your meals.
Government guidelines recommend an intake of 30g of fibre per day for adults, but most people are only eating around 20g. Children need less fibre than adults, but still more than they are currently consuming.
