
A low-fiber diet is recommended for people experiencing inflammatory bowel disease (IBD) flare-ups, gastrointestinal surgery, or diarrhea, among other conditions. It involves limiting insoluble fiber, found in whole-grain and bran products, and soluble fiber, found in oats, peas, beans, and apples, among other foods. While following a low-fiber diet, individuals are advised to opt for refined grains, cooked or canned fruits and vegetables, and white bread products without added whole grains, bran, or seeds. Mushrooms, which are the focus of this discussion, are included in lists of low-fiber foods, suggesting that they are suitable for a low-fiber diet. However, it is important to note that the context of one's overall diet and specific health considerations may influence whether mushrooms are a recommended choice.
| Characteristics | Values |
|---|---|
| What is a low-fiber diet? | A diet that limits high-fiber foods, including whole-grain breads and cereals, nuts, seeds, raw or dried fruits, and vegetables. |
| Why follow a low-fiber diet? | To limit how much undigested food moves through your digestive tract (stomach and intestines). This means your body will make less stool, and what stool your body does make will move through your digestive tract more slowly. |
| When to follow a low-fiber diet | Your doctor may recommend a low-fiber diet if you have inflammatory bowel disease (IBD) flare-up, are receiving radiation therapy to your pelvis and lower bowel, are experiencing diarrhea or gastrointestinal (GI) surgery, or have a bowel obstruction. |
| Foods to eat on a low-fiber diet | Mushrooms, chicken or turkey (skinless and baked, broiled, or grilled), fish, eggs, noodles, potatoes (peeled and boiled or baked), white bread, white rice, carrots (cooked), canned fruit, fruit juice, string beans (cooked), vegetable juice, custard, gelatin, yogurt (plain or vanilla), butter, mayonnaise |
| Foods to avoid on a low-fiber diet | Raw fruits and vegetables, whole wheat and whole grain products, highly refined foods with added fiber (such as white bread), nuts, seeds |
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What You'll Learn

Mushrooms are low in fibre
Mushrooms are also included in low-residue diets, which are often recommended for people experiencing a flare-up of inflammatory bowel disease (IBD), which includes Crohn's disease and ulcerative colitis. A low-residue diet limits high-fibre foods, like whole-grain breads and cereals, nuts, seeds, and raw or dried fruits and vegetables. The skin and seeds of many fruits and vegetables are full of fibre, so they should be peeled and seeds should be avoided.
Fibre is the part of fruits, vegetables, beans, legumes, nuts, and grains that the body does not digest. There are two types of fibre: insoluble and soluble. Insoluble fibre is found mainly in whole-grain and bran products, and does not break down in water or in the body. Soluble fibre is found in foods such as oats, peas, beans, apples, citrus fruits, and barley, and breaks down in water to form a gel. A low-fibre diet is low in both types of fibre.
In addition to mushrooms, low-fibre and low-residue diets include animal products like beef, lamb, chicken, fish, and pork, as long as they are lean, tender, and soft. Eggs are also allowed. Dairy products like cheese, cottage cheese, milk, and yogurt are also allowed, but should be avoided if you are lactose intolerant.
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Fibre types: soluble and insoluble
A low-fiber diet is recommended in cases of inflammatory bowel disease (IBD) flare-up, radiation therapy to the pelvis and lower bowel, persistent diarrhoea, and recent gastrointestinal surgery or a bowel obstruction. Such a diet limits the amount of undigested food moving through the digestive tract, reducing stool volume and slowing its movement.
Fibre, or dietary fibre, is the part of fruits, vegetables, beans, legumes, nuts, and grains that the body does not digest. It is essential for a healthy diet and can support cardiovascular and digestive health, as well as helping to fight diabetes and some cancers. There are two types of fibre: insoluble and soluble. Insoluble fibre is found mainly in whole-grain and bran products, while soluble fibre is found in foods like oats, peas, beans, apples, citrus fruits, barley, and oat bran.
Insoluble fibre does not dissolve or break down in water, passing through the intestines undigested. Instead, it absorbs water and other fluids, sticking to other materials to form softer, bulkier, and more regular stools. Insoluble fibre includes plant cellulose, hemicellulose, and lignin, and is found in wheat bran, vegetables, and whole grains.
Soluble fibre, on the other hand, dissolves in water, forming a gel-like substance in the intestines. Soluble fibre includes plant pectin and gums, and is found in nuts, seeds, beans, lentils, peas, some fruits and vegetables, and psyllium, a common fibre supplement. Soluble fibre can improve digestion and lower blood sugar, while also helping to lower the risk of heart disease.
While it is important to consume both types of fibre, focusing on total fibre intake rather than the specific balance of soluble and insoluble fibre is recommended. Men aged 50 and younger should aim for 38 grams of fibre per day, while those over 50 should aim for 30 grams. Women aged 50 and younger should consume 25 grams, and those over 50 should consume 21 grams.
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Low-fibre diets reduce stool volume
A low-fibre diet is recommended for people with certain medical conditions, such as inflammatory bowel disease (IBD), or those preparing for specific medical procedures, like a colonoscopy. It is not intended for weight loss.
The human body cannot digest fibre, which is found in fruits, vegetables, beans, legumes, nuts, and grains. Fibre is of two types: insoluble and soluble. Insoluble fibre, found in whole-grain and bran products, does not break down in water and makes stool bulkier. Soluble fibre, found in oats, peas, beans, apples, citrus fruits, and barley, breaks down in water to form a gel. A low-fibre diet limits the amount of undigested food moving through the digestive tract, reducing stool volume and slowing down its movement.
Mushrooms are a type of fungus and do not contain fibre, making them suitable for a low-fibre diet. However, it is important to note that a low-fibre diet should only be followed under medical supervision and for a limited time, as recommended by a healthcare professional.
When following a low-fibre diet, it is important to limit the consumption of raw fruits and vegetables, whole wheat, and whole grain products. Instead, opt for refined grains, cooked or canned fruits and vegetables, and white bread without added whole grains, bran, or seeds.
It is also worth noting that a long-term low-fibre diet may not be beneficial for overall health. While it can help manage diarrhoea and reduce stool volume in the short term, it is important to gradually reintroduce fibre into the diet as symptoms improve.
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Diarrhea treatment: low-fibre foods
A low-fibre diet can help manage diarrhoea. Fibre helps the bowels move and push stool through, but too much fibre can make diarrhoea worse. A low-fibre diet will not stimulate the bowels as much and will be easier to digest. It is recommended that you eat less than 2 grams of fibre per serving of food or less than 3 grams per meal when following a low-fibre diet. To manage diarrhoea, you should aim for about 10 grams of fibre per day.
When following a low-fibre diet, it is important to look at the serving size on the nutrition facts label. Eating more or less than the recommended serving size will change the total fibre of your portion. Choose refined grains that have been processed to remove most of the fibre, such as white bread products without added whole grains, bran, or seeds. Avoid raw fruits and vegetables, and choose cooked or canned fruits and vegetables instead.
Some examples of low-fibre foods include chicken, fish, eggs, puddings, mashed potatoes, noodles, rice, yogurt, cottage cheese, cream of wheat, farina, smooth peanut butter, white bread, bananas, applesauce, and canned fruit. It is recommended to eat 5 to 6 small meals or snacks throughout the day instead of 3 large meals.
It is important to note that a low-fibre diet may be recommended for various reasons, including inflammatory bowel disease (IBD) flare-ups, radiation therapy to the pelvis and lower bowel, persistent diarrhoea, recent gastrointestinal surgery, or a bowel obstruction. Consult with your healthcare provider to determine if a low-fibre diet is appropriate for your specific situation.
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High-fibre foods: whole grains, bran
Fibre is a vital part of a healthy diet, but most people consume less than half of the recommended amount. A healthy adult needs 25 to 38 grams of fibre per day, but the average Canadian daily intake is only about 14 grams. Fibre is a carbohydrate found in plants that passes through the body undigested, adding zero calories. This makes it an excellent food group to consume if you are trying to manage your weight. Studies show that women who consumed more fibre were half as likely to be obese as those who consumed less. Obesity is a risk factor for heart disease and stroke.
There are two types of fibre: insoluble and soluble. Insoluble fibre, also known as roughage, is found mainly in whole-grain and bran products. It does not break down in water or in the body and makes stool bulkier and more formed. It helps you feel fuller and promotes bowel regularity. Good sources of insoluble fibre include wheat bran, whole-grain foods, and the skins, leaves, and seeds of vegetables and fruits.
Soluble fibre, on the other hand, forms a gel when mixed with water. It is found in foods such as oats, oatmeal, peas, beans, apples, citrus fruits, barley, and oat bran. Soluble fibre may help lower blood cholesterol and control blood sugar levels. It also helps make the stool bulkier.
When choosing high-fibre foods, opt for whole grains such as wild rice, brown rice, and oatmeal. Canada's Food Guide recommends filling a quarter of your plate with whole grains at every meal. Choose grain products that are lower in fat, sugar, and salt. Look for 100% whole grain or 100% whole wheat with germ listed as the first ingredient on the nutrition label. Quinoa is another excellent source of fibre, especially for those on a plant-based diet. It also contains magnesium, folate, vitamin B1, and phosphorus. One cup of cooked quinoa provides around 8 grams of fibre.
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Frequently asked questions
A low-fiber diet limits the amount of undigested food moving through your digestive tract. This means your body will produce less stool, and what stool your body does make will move through your digestive tract more slowly.
Some common reasons for following a low-fiber diet are to manage diarrhea, to prepare for a colonoscopy, or to recover from gastrointestinal surgery.
Yes, mushrooms are included in a low-fiber diet.

























