Some people with cancer who are getting certain types of cancer treatment might be told by their doctor to follow a low-fiber diet. There are other health problems that might be managed by eating low-fiber foods, too. Always ask your cancer care team if you should follow any special diet before, during, or after treatment.

What is a low-fiber diet?

A low-fiber diet means you eat foods that do not have a lot of fiber.

If you have certain medical problems, you may be asked to reduce the amount of fiber in your diet to rest your bowels (or intestines). A low-fiber diet reduces the amount of undigested food moving through your bowels, so that your body makes a smaller amount of stool. A low-fiber diet may be suggested after some types of surgery or if you have diarrhea, cramping, or trouble digesting food.

There are 2 kinds of fiber, soluble and insoluble. Insoluble fiber doesn’t dissolve in the stomach and can have rough hard bits that irritate the intestines as it passes through. Soluble fiber attracts water into the intestines and becomes a gel. Foods with a little soluble fiber can often be eaten in small amounts (depending on why you’re on a low-fiber diet) because the soft fiber gel doesn’t irritate the intestines the same way.

What are low-fiber foods?

If your doctor tells you to follow a low-fiber diet, here are low-fiber foods you can eat and higher-fiber foods you should avoid. Remember to always choose foods that you would normally eat. Do not try any foods that caused you discomfort or allergic reactions in the past.

If you are on a “low-residue diet,” your food choices are even more restricted than those listed below.

Talk with your cancer care team or dietitian if you have questions about certain foods or amounts.

Meat, fish, poultry, and protein

Eat

Tender cuts of meat

Ground meat

Tofu

Fish and shellfish

Smooth peanut butter

Eggs

Bake, broil, or poach meats, and use mild seasonings. Try preparing meats as stews, roasts, meatloaves, casseroles, sandwiches, and soups using ingredients on the approved lists.

Scramble, poach, or boil eggs; or make omelets, soufflés, custard, puddings, and casseroles, using ingredients noted below. You might want to ask your doctor, nurse, or dietitian about other foods may be OK for you to eat, and find out when you can go back to your normal diet.

Avoid

All beans, nuts, peas, lentils, and legumes

Processed meats, hot dogs, sausage, and cold cuts

Tough meats with gristle

Dairy: Milk and cheese

Eat

Only in small to medium amounts and only if they don’t cause problems for you

Milk, chocolate milk, buttermilk, and milk drinks

Yogurt without seeds or granola

Sour cream

Cheese

Cottage cheese

Custard or pudding

Ice cream or frozen desserts (without nuts)

Cream sauces, soups, and casseroles

You can use these items in desserts, snacks, or breads.

Bread, cereals, and grains

Eat

White breads, waffles, French toast, plain white rolls, or white bread toast

Pretzels

Plain pasta or noodles

White rice

Crackers, zwieback, melba, and matzoh (no cracked wheat or whole grains)

Cereals without whole grains, added fiber, seeds, raisins, or other dried fruit

Use white flour for baking and making sauces. Grains, such as white rice, Cream of Wheat, or grits, should be well-cooked.

Include the above grains in casseroles, dumplings, soufflés, cheese strata, kugels, and pudding.

Avoid any food that contains

Brown or wild rice

Whole grains, cracked grains, or whole wheat products

Kasha (buckwheat)

Corn bread or corn meal

Graham crackers

Bran

Wheat germ

Nuts

Granola

Coconut

Dried fruit

Seeds

Vegetables and potatoes

Eat

Tender, well-cooked fresh or canned vegetables without seeds, stems, or skins

Cooked sweet or white potatoes without skins

Strained vegetable juices without pulp or spices

You can also eat these with cream sauces, or in soups, soufflés, kugels, and casseroles.

Avoid

All raw or steamed vegetables

All types of beans

Potatoes with skin

Peas

Corn

Cabbage, broccoli, cauliflower, Brussels sprouts, and greens

Sauerkraut

Onions

Fruits and desserts

Eat

Soft canned or cooked fruit without seeds or skins (small amounts)

Small amounts of well-ripened banana

Strained or clear juices

Small amounts of soft cantaloupe or honeydew melon

Cookies and other desserts without whole grains, dried fruit, berries, nuts, or coconut

Sherbet and popsicles

Serving suggestions include gelatins, milk shakes, frozen desserts, puddings, tapioca, cakes, and sauces.

Avoid

All raw or dried fruits

Berries

Prune juice, prunes, and raisins

Other foods

Eat

Mayonnaise and mild salad dressings

Margarine, butter, cream, and oils in small amounts

Plain gravies

Plain bouillon and broth

Ketchup and mild mustard

Spices, cooked herbs, and salt

Sugar, honey, and syrup

Clear jellies

Hard candy and marshmallows

Plain chocolate

Avoid

Marmalade

Pickles, olives, relish, and horseradish

Popcorn

Potato chips

Liquids

Keep in mind that low-fiber foods cause fewer bowel movements and smaller stools. You may need to drink extra fluids to help prevent constipation while you are on a low-fiber diet. Drink plenty of water unless your doctor tells you otherwise, and use juices and milk as noted above.