Fiber: the main friend of your intestines
Section 1: What is fiber and why is it so important?
Fiber, or dietary fiber, is a complex carbohydrate contained in plant foods, which is not digested by enzymes in the small intestine of a person. Instead, it passes into the large intestine, where it is partially or completely fermented by bacteria. This process of fermentation, as well as the physical properties of fiber, have a huge impact on the health of the digestive system and the whole organism as a whole.
Traditionally, fiber was divided into two main categories: soluble and insoluble. This classification is based on its ability to dissolve in water. However, the modern understanding of fiber goes beyond the scope of simple dissolution. We are talking about a set of various polysaccharides and lignin with different physiological effects.
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Soluble fiber: This fiber when contacting water forms a gel -like mass. It is found in foods such as oats, apples, citrus fruits, beans and peas. Soluble fiber helps reduce blood cholesterol, slows down glucose absorption, contributing to the stabilization of blood sugar, and provides a feeling of saturation, which can be useful for weight control. The mechanism of reduction of cholesterol is due to the fact that soluble fiber is associated with bile acids in the intestines, preventing their reabsorption. To produce new bile acids, the body uses cholesterol, thereby reducing its level in the blood.
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Insoluble fiber: This type of fiber does not dissolve in water and adds volume to the chair. It is found in whole grain products, vegetables (especially in the peel), fruits and bran. Insoluble fiber contributes to regular bowel movements, prevents constipation and can reduce the risk of diverticulitis and hemorrhoids. It stimulates intestinal motility, accelerating the advance of food along the digestive tract.
Section 2: Types of fiber and their specific properties
Modern science distinguishes many different types of fiber, which differ in structure and physiological effects. Some of the most important types include:
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Beta-glucan: These are soluble fibers contained in oats and barley. They are known for their powerful hypocholesterol properties and the ability to improve immunity. Beta-glucans stimulate the activity of immune cells, such as macrophages and natural killers.
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Pectin: This is a soluble fiber contained in apples, citrus fruits and other fruits. Pectin has gel -forming properties and helps to reduce the level of cholesterol and blood sugar. It can also bind toxins in the intestines and contribute to their elimination from the body.
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Guar gum: This is a soluble fiber obtained from guar seeds. It has high viscosity and is used in the food industry as a thickener and stabilizer. Guar gum can help reduce the level of cholesterol and blood sugar, as well as improve saturation.
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Inulin: This is a soluble fiber related to fruit. It is contained in products such as onions, garlic, chicory and artichokes. Inulin is a prebiotic, that is, it serves food for beneficial bacteria in the intestines, contributing to their growth and development.
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Cellulose: This is insoluble fiber, which is the main component of the cell walls of plants. It is found in whole grain products, vegetables and fruits. Cellulose helps to increase the volume of stool and accelerate intestinal motility.
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Lignin: This is insoluble fiber contained in the woody parts of plants, such as seeds, bark and stems. Lignin gives plants strength and stiffness. It has antioxidant properties and can bind bile acids in the intestines.
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Sustainable starch: This is a type of starch, which is not digested in the small intestine and enters the large intestine, where it is fermented by bacteria. Sustainable starch is contained in products such as green bananas, cooled boiled potatoes and legumes. It has prebiotic properties and can improve insulin sensitivity.
Section 3: The benefits of fiber for intestinal health
Fiber plays a key role in maintaining intestinal health and preventing various diseases.
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Stool regularity: Fiber, especially insoluble, increases the volume of the stool and stimulates intestinal motility, which contributes to regular emptying and prevents constipation. Regular bowel movements are necessary to remove toxins and waste from the body.
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Prevention of hemorrhoids and diverticulitis: Regular stool, provided by fiber, reduces the load on the rectum and anal canal, reducing the risk of hemorrhoids. In addition, fiber prevents the formation of diverticulums (protrusions) in the colon wall, thereby reducing the risk of diverticulitis.
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Maintaining a healthy microflora: Fiber serves as food for beneficial bacteria in the intestines (prebiotic). These bacteria ferment fiber, producing short -chain fatty acids (KCHK), such as butyrate, acetate and propionate. KCZHK has a positive effect on the health of the intestines and the whole organism as a whole.
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Reduction of risk of colon cancer: KCZHK, produced during fiber fermentation, has an anti -inflammatory effect and can suppress the growth of cancer cells in the colon. In addition, fiber contributes to a faster elimination of carcinogens from the intestine.
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Improving digestion: Fiber contributes to more effective digestion of food, improves the absorption of nutrients and reduces gas formation. It can also help reduce the symptoms of irritable bowel syndrome (SRK).
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Protection of the intestinal barrier: KCZHK, especially Butyrate, are the main source of energy for cells of the mucous membrane of the colon (colonocytes). Butyrate strengthens the intestinal barrier, preventing the penetration of harmful substances and bacteria into the bloodstream.
Section 4: The benefits of fiber for general health
In addition to the benefits for the intestines, fiber has a positive effect on the health of the whole organism.
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Close -to -level decrease in cholesterol: Soluble fiber binds to bile acids in the intestines, preventing their reabsorption. To produce new bile acids, the body uses cholesterol, thereby reducing its level in the blood.
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Blood sugar control: Soluble fiber slows down the absorption of glucose from the intestines, preventing sharp surges in blood sugar. This is especially important for people with diabetes or prediabet.
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Weight control: Fiber contributes to a feeling of saturation, which helps to reduce calorie intake and control weight. It can also affect hormones that regulate appetite.
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Reducing the risk of cardiovascular diseases: Fiber reduces cholesterol levels, normalizes blood sugar and helps to reduce blood pressure, which together reduces the risk of developing cardiovascular diseases.
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Prevention of certain types of cancer: Studies show that the consumption of a large amount of fiber is associated with a decrease in the risk of developing colon, breast and prostate cancer.
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Improvement of immunity: Fiber, especially prebiotic fibers, stimulates the growth of beneficial bacteria in the intestines, which play an important role in maintaining immunity. They help fight pathogenic microorganisms and strengthen the intestinal barrier.
Section 5: Fiber sources in nutrition
Fiber is found exclusively in plant foods. To ensure sufficient fiber consumption, it is necessary to include various plant products in the diet.
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Fruits: Apples, pears, bananas, berries (raspberries, strawberries, blueberries), citrus fruits (oranges, grapefruits), plums, peaches. The peel of fruit, where it is possible, contains more fiber, so it is recommended not to remove it.
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Vegetables: Broccoli, cauliflower, Brussels cabbage, carrots, spinach, zucchini, pumpkin, sweet pepper, cucumbers, tomatoes, leaf greens (salad ,rugol, mangold).
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Legumes: Beans (red, white, black, pinto), lentils, chickpeas, peas, soy. Legumes are an excellent source of both soluble and insoluble fiber.
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Whole grain products: Oats, barley, brown rice, cinema, buckwheat, whole grain bread, whole grain pasta, bulgur, couscous. It is important to choose products on the packaging of which are indicated “whole granar”.
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Nuts and seeds: Almonds, walnuts, hazelnuts, flax seeds, chia seeds, sunflower seeds, pumpkin seeds. Nuts and seeds also contain useful fats and trace elements.
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Bran: Wheat bran, oat bran. Bran are a concentrated source of fiber and can be added to cereals, yogurts, baking.
Section 6: Recommendations for fiber consumption
The recommended daily fiber consumption is 25-35 grams. However, most people consume much less fiber than necessary. A gradual increase in fiber consumption will help to avoid discomfort in the abdomen, such as bloating and gas formation.
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Start gradually: If you are not used to drinking a lot of fiber, start with small portions and gradually increase them within a few weeks. This will give your intestines the time to adapt.
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Drink enough water: Fiber absorbs water, so it is important to drink enough liquid (at least 8 glasses per day) to avoid constipation.
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Turn on the fiber in each meal: Add fruits or vegetables to breakfast, dinner and dinner. Replace white bread with whole grain. Add legumes to soups and salads.
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Read the labels: Pay attention to the content of fiber in the products that you buy.
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Be attentive to additives with fiber: If you experience difficulties in obtaining a sufficient amount of fiber from food, you can use additives with fiber, such as psychillium or methyl cellulose. However, before taking additives, it is recommended to consult a doctor.
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Diversify your diet: Use various sources of fiber to get all the necessary types of dietary fibers.
Section 7: possible side effects and contraindications
Despite numerous beneficial properties, the consumption of a large amount of fiber can cause some side effects, especially with a sharp increase in its consumption.
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Bloating and gas formation: These are the most common side effects associated with fiber fermentation in the large intestine. They usually take place as the intestines adapt.
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Constipation: Insufficient fluid intake with high fiber consumption can lead to constipation.
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Diarrhea: In some people, especially with a sensitive intestine, the consumption of a large amount of fiber can cause diarrhea.
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Violation of the absorption of minerals: Fiber can associate some minerals, such as iron and zinc, and impede their absorption. However, this is usually not a problem for people who use a balanced diet.
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Contraindications: Fiber is contraindicated for some intestinal diseases, such as acute intestinal obstruction, ulcerative colitis in the exacerbation stage and Crohn’s disease in the exacerbation stage. People with these diseases should consult a doctor before increasing fiber consumption.
Section 8: Fiber and intestinal microbia
The intestinal microbia is a combination of all microorganisms that inhabit the intestines of a person. Fiber plays a key role in the formation and maintenance of a healthy microbioma.
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Prebiotic effect: Fiber is food for beneficial bacteria in the intestines. It stimulates their growth and development, contributing to an increase in the number and diversity of microbioma.
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CCHK production: Useful bacteria enzym fiber, producing short -chain fatty acids (KCHK), such as butyrate, acetate and propionate. KCZHK has numerous beneficial effects on the health of the intestines and the whole organism as a whole.
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Influence on the composition of the microbioma: Different types of fiber effectively affect the composition of the microbioma. For example, inulin stimulates the growth of bifidobacteria, and steady starch helps to increase the population of bacteria producing Butirates.
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Dysbiosis: Insufficient fiber consumption can lead to dysbiosis – a violation of the balance of intestinal microflora. Dysbacteriosis can cause various symptoms, such as bloating, gas formation, diarrhea, constipation and reducing immunity.
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Probiotics and prebiotics: Probiotics are living microorganisms that have a positive effect on the intestinal health. Prebiotics are substances that serve as food for beneficial bacteria in the intestines. The combination of probiotics and prebiotics (synbiotics) can be especially effective for maintaining the health of a microbioma.
Section 9: Fiber for children
Fiber is as important for children’s health as for adult health. It contributes to a regular chair, prevents constipation and supports a healthy intestinal microflora.
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Recommended fiber consumption standards for children: Children are recommended to consume the amount of fiber equal to their age in years plus 5 grams per day. For example, a child aged 5 years is recommended to consume 10 grams of fiber per day.
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Sources of fiber for children: Fruits, vegetables, whole grains and legumes are excellent sources of fiber for children. It is important to offer children a variety of products so that they receive all the necessary types of dietary fiber.
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Gradual increase in fiber consumption: As in adults, an increase in fiber consumption in children should be gradual in order to avoid discomfort in the abdomen.
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Drink enough water: Children also need to drink enough water to avoid constipation with high fiber consumption.
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Limiting refined products: Refined products, such as white bread, white flour and sweets, contain little fiber. It is necessary to limit the consumption of these products and replace them with whole grain analogues.
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An example of a menu for a child with a sufficient amount of fiber:
- Breakfast: oatmeal porridge with berries and nuts.
- Lunch: soup with vegetables and beans, whole grain bread.
- Dinner: baked chicken with a vegetable side dish (broccoli, carrots).
- Snacks: fruits, vegetable sticks, whole grain crackers.
Section 10: Fiber in special diets
Fiber plays an important role in various special diets, such as weight loss diet, diabetics diet and diet for people with intestinal diseases.
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Diet for weight loss: Fiber contributes to a feeling of saturation, which helps to reduce calorie intake and control weight. The inclusion of a large amount of fiber in the diet can be an effective way to lose weight.
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Diet for diabetics: The fiber slows down the absorption of glucose from the intestines, preventing sharp leaps for blood sugar. A diet rich in fiber is an important part of diabetes.
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Diet for people with intestinal diseases: People with intestinal diseases, such as irritable bowel syndrome (SRK) and inflammatory intestinal diseases (OZK), need to carefully select fiber sources. Some types of fiber can cause exacerbation of symptoms, while others can have a positive effect. It is recommended to consult a doctor or nutritionist to develop an individual food plan. In some cases, a fodmap diet may be required, which limits the consumption of certain types of carbohydrates, including some types of fiber.
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Vegetarian and vegan diet: Vegetarian and vegan diets are usually rich in fiber, as they are based on plant foods. However, it is important to ensure a sufficient variety of products to get all the necessary types of dietary fiber.
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Blind diet: People who observe a gluten -free diet need to pay attention to fiber sources, since many products containing gluten are also good sources of fiber. It is recommended to use gluten -free whole grains, such as film, buckwheat and brown rice, as well as fruits, vegetables and legumes.
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