Low Residue Diet: What It Is, Food Lists and How It Differs From Low Fiber

A low residue diet is a short-term eating plan, usually prescribed by a clinician, that limits fiber and other hard-to-digest foods so you have fewer and smaller bowel movements. It swaps whole grains, beans, nuts, seeds, raw vegetables and fruit skins for refined grains, tender proteins, well-cooked vegetables without skins and canned or soft fruit. Today most hospitals call it a low fiber diet, because nutrition experts dropped the word residue for lack of a measurable definition. Below is what the diet is, low residue diet foods with USDA fiber values, how it is used before a colonoscopy, and when to call your care team.

Peptide Labs does not sell foods or products for medical diets. This article is general nutrition information, not medical advice. If a clinician gave you a diet sheet, their instructions come first.

What is a low residue diet?

Residue is what is left in the colon after digestion. A 2015 review in Advances in Nutrition (Vanhauwaert and colleagues) describes it as indigestible food material plus bacteria, digestive secretions and cells shed from the gut lining. Fiber is the part of that mix that diet can change most, so a low residue diet in practice means eating less fiber and fewer foods with tough skins, seeds and hulls.

The aim is a lighter load for the bowel. Northwestern Medicine’s patient handout says the diet is used to help you have fewer and smaller bowel movements, easing irritation and discomfort. MedlinePlus notes that providers may recommend a low-fiber plan for a limited time during flare-ups of certain bowel conditions or after some intestinal surgeries. It is not a weight-loss diet and not a general healthy-eating pattern; it is a temporary tool your clinician chooses for a specific situation.

Low residue vs low fiber: is there a difference?

Older diet sheets described them as two levels: a low fiber diet limited fiber, and a low residue diet also limited milk and other foods thought to add bulk to stool. The 2015 review explains that the Academy of Nutrition and Dietetics removed low-residue diets from its Nutrition Care Manual because there was no scientifically accepted way to define or measure food residue. The authors proposed simply calling it a low-fiber diet and defining it by a maximum fiber amount per day.

That history explains why handouts disagree. Some hospital sheets still limit milk products, while others, including the MedlinePlus list, allow milk, yogurt and cheese and only flag lactose for people who do not tolerate it. Your clinician’s version, including any daily fiber limit in grams, is the one to follow.

Low residue diet foods: USDA fiber per serving

The table compares common foods that low-fiber handouts usually allow with foods they usually limit. Fiber values come from USDA FoodData Central SR Legacy (FDC IDs listed), with percent Daily Value (%DV) based on the FDA Daily Value of 28 grams of fiber.

Notice that fiber grams are not the whole story. Cooked carrots and raw broccoli have about the same fiber per serving, yet handouts allow the first and limit the second, because texture, skins, seeds and how well a food is cooked also matter. Peeling makes a difference too: in USDA data a baked potato has about 1.5 grams of fiber per 100 grams without its skin and 2.2 grams with it. For the opposite list, see our guide to fiber-rich foods.

Foods usually allowed

• Grains: white bread, white rice, refined pasta, and cereals made from refined flour. MedlinePlus and Northwestern both point to grain foods with less than 2 grams of fiber per serving.
• Proteins: eggs, fish, poultry and tender, well-cooked meat; smooth nut butters.
• Vegetables: well-cooked or canned vegetables without seeds or skins, such as carrots, green beans and potatoes without skins.
• Fruit: canned fruit in juice, applesauce, ripe bananas, melon and pulp-free juice.
• Dairy: milk, yogurt and mild cheese where your handout allows them, or lactose-free versions if lactose bothers you.

Foods usually limited

• Whole grains, brown rice, quinoa, oatmeal, bran cereals and popcorn.
• Dried beans, peas and lentils, nuts, seeds and chunky nut butters.
• Raw vegetables, potato skins, corn and other tough or stringy vegetables.
• Raw fruit with skins or seeds, berries, dried fruit, fruit juice with pulp and prune juice.
• Tough, fatty or fried meats, as listed on the Northwestern handout.

Low residue diet before colonoscopy

A low residue diet before colonoscopy is one of the most common reasons people meet this diet. In 2025, the US Multi-Society Task Force on Colorectal Cancer updated its bowel preparation recommendations (Jacobson and colleagues, Gastroenterology). For most outpatients at low risk of a poor prep, the group advises limiting diet restrictions to the day before the procedure only, using low-residue or low-fiber foods or full liquids for early and midday meals when the prep is split into two parts. It found no benefit from longer, stricter diets and said clear-liquid-only diets are unnecessary for most of these patients. The 2015 review similarly found that low-fiber diets did not harm prep quality in trials and were easier to tolerate than clear liquids.

These recommendations do not apply to everyone. The task force excludes people at risk of an inadequate prep, such as hospital inpatients and people with constipation, diabetes, cirrhosis, a past poor prep or certain medicines. Your endoscopy team’s instructions on timing, liquids and the prep product always come first.

How long to follow it, and the return to fiber

A low fiber diet is meant to be temporary. Northwestern’s handout warns that following it for a long time may mean missing vitamins and minerals, and advises asking your physician or dietitian how long to stay on it, whether you need nutrition supplements and how to add fiber back. Most whole grains, beans, fruit and vegetables leave the menu, so the diet is low in nutrients those foods supply. When your clinician clears you, fiber is usually added back gradually; our guides to daily fiber needs and fiber side effects explain why a slow increase with fluids tends to be easier on the gut.

Do not restart psyllium or other fiber supplements, or use them for constipation, while on a low-fiber plan unless your clinician says so. If you were told to follow a different gut diet, such as the low FODMAP approach, that is a separate plan with different rules. For a nutrient-dense side once fiber is back, see our sibling guide to sweet potatoes.

When to call your clinician

Contact your care team rather than adjusting the diet yourself if symptoms change. NIDDK advises adults to see a doctor right away for:

• Stools that are black and tarry or contain blood or pus.
• Severe pain in the abdomen or rectum, frequent vomiting or a high fever.
• Diarrhea lasting more than 2 days, or six or more loose stools a day.
• Signs of dehydration: extreme thirst or dry mouth, urinating less, dark urine, dizziness, or sunken eyes or cheeks (see our electrolytes guide).

People who were put on a low-fiber diet because of a narrowed bowel should also ask their clinician which symptoms of a blockage, such as cramping with bloating and no bowel movements, need urgent care.

Frequently Asked Questions

Questions about a label? Contact us or read our Buyer’s Guide. A low-fiber eating plan is a medical diet: follow the written instructions from your own clinician or dietitian, and ask them before taking any supplement while you are on it. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Last reviewed October 2026.

Related guides: Bland Diet: Food List, Foods to Avoid and USDA Nutrition, High Fiber Foods: USDA List of Fruits, Vegetables, Beans and Grains, Fiber for Constipation: What the Evidence Says, How Long It Takes and Natural Laxative Foods.