Why is fibre an important part of our diet?

Question

This is to do with food and digestion, bilogy, with science. I would like to have a detailed answer please.

Answer 1

Dietary fibres are mostly cellulose and hemicellulose derivatives.

Thus they are not capable of being digested by us humans.

Most of them are insoluble or sparingly soluble in water.

Thus they pass unchanged through the Gastro-intestianl tract.
The cause water retention in the large intestine and the colon.

Hence the excreta becomes softer and smoother, allowing easy passage through the colon, preventing CONSTIPATION.

Besides the water retained by the fibers maintain moisture within the colon promoting growth of beneficial microorganisms, which synthesize Vitamin B12, D etc.

Dietary fibres are very important as you can see from the reasons mentioned. They form an integral part of a Balanced diet.

If the diet is devoid of fibres diseases like Constipation
Irritable bowel syndrome, collitis can occur.

It has long been believed that increasing fibre intake will also help prevent certain cancers, such as colon cancer.

Many people who are overweight have been shown to lose significant amounts of excess body fat simply by increasing the amount of dietary fibre, especially soluble fibre, in their daily diet.

Answer 2

The Benefits of Fibre


1. Keeps the heart healthy. Soluble fibre can help regulate blood sugar levels (by slowing the rate which sugar is absorbed by the body), and by lowering serum cholesterol, protecting against heart disease. As well, soluble fibre can possibly reduce excess blood fats and lower cholesterol.

2. Contributes to weight loss. Increasing the amount of fibre,especially soluble fibre decreases excess body fat in overweight people.

Fibrous foods are often bulky and, therefore, filling. They also tend to be low in fat. Soluble fibre forms a gel that both slows down the time it takes to empty the stomach and the time for food to go through the digestive system. This extends the time a person feels full, while also 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 with obesity and an increased risk of diabetes.

The extra chewing time often required of high fibre foods also helps contribute to feeling satisfied, and as a result, a person on a high fibre diet is likely to eat less food and so consume fewer calories.

3. Cancer Protection - It has long been believed that increasing fibre intake will also help prevent certain cancers, such as colon cancer. There is a current debate going on in the scientific communities after a series of tests failed to show a concrete link between increased fibre consumption and a lower risk of developing cancer.

However, many argue that the antioxidants and flavanoids found in many high-fibre foods were key contributors to fibre’s cancer-preventing properties (the later studies were done using alternative fibre sources that lacked these cancer-fighting components). What is undisputable though is that a healthy, regular digestive system is necessary in the prevention of colon cancer, and getting enough fibre in your diet is essential for a healthy digestive system.

Answer 3

Fibre keeps the digestive system healthy
Dietary fibre is mainly needed to keep the digestive system healthy. It also contributes to other processes, such as stabilising glucose and cholesterol levels. In countries with traditionally high fibre diets, diseases such as bowel cancer, diabetes and coronary heart disease are much less common than in the West.

Disorders that can arise from a low fibre diet include:
Constipation
Irritable bowel syndrome
Diverticulitis
Heart disease
Some cancers.

Answer 4

fiber is good for human's digestive systems. It helps u to defecate and avoid hemaroids

Answer 5

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some is soluable, some is insoluable. it all comes out, and it is good.

Answer 6

This is to do with food and digestion, and avoids constepation, protects intestense, and harder to gain weight.