What is a Non-Fibre Diet?
A non-fibre, or low-residue, diet is a temporary eating plan designed to reduce the frequency and volume of your bowel movements. The 'residue' is the undigested food material that passes through the large intestine, much of which is dietary fibre. By limiting fibre and other difficult-to-digest foods, the diet minimizes the workload on the digestive system and helps manage symptoms like diarrhoea, bloating, and abdominal pain.
This diet is typically prescribed for a short period to manage specific medical conditions or as preparation for a procedure. Common reasons include inflammatory bowel disease flare-ups, diverticulitis, bowel obstruction, pre-colonoscopy preparation, and post-surgery recovery.
Foods to Include on a Non-Fibre Diet
Following a non-fibre diet requires focusing on refined, well-cooked, and low-residue options. The key is to avoid skins, seeds, and tougher fibrous parts of food. Here is a breakdown of what you can eat:
Grains
Allowed grains include white bread, plain white pasta and noodles, white rice, refined cereals like Cornflakes, and plain crackers such as saltines.
Fruits
You can eat well-ripened, raw fruits like bananas and melons, or peeled and cooked fruits such as applesauce, canned peaches, and pears. Pulp-free fruit juices are also permitted.
Vegetables
Peeled and well-cooked vegetables like carrots, potatoes without skin, asparagus tips, and green beans are suitable. Canned vegetables and strained vegetable juices are also options.
Proteins
Tender, cooked meats such as lean beef, lamb, pork, and poultry (without skin) are allowed, as is tender fish. Eggs, tofu, and smooth nut butters without crunchy pieces are also included.
Dairy (if tolerated)
Dairy options include milk, non-dairy alternatives, cheese, smooth yogurt without fruit or seeds, ice cream, and plain pudding.
Comparison: Foods to Include vs. Foods to Avoid
The following table highlights the differences between permitted low-residue foods and high-fibre foods to avoid on a non-fibre diet.
| Food Category | Foods to Include (Low-Residue) | Foods to Avoid (High-Fibre) | 
|---|---|---|
| Grains | White bread, refined pasta, white rice, Cornflakes | Whole-wheat bread, brown rice, whole-grain pasta, oatmeal, granola | 
| Fruits | Ripe banana, peeled peaches, applesauce, melons, clear juices | Berries, dried fruit, pineapple, raw unpeeled fruits, juices with pulp | 
| Vegetables | Cooked and peeled carrots, potatoes (no skin), green beans, tomato puree | Raw vegetables, corn, broccoli, cabbage, brussels sprouts, potatoes with skin | 
| Proteins | Tender meats, fish, eggs, tofu, smooth nut butter | Tough or gristly meats, beans, lentils, chickpeas, nuts, seeds | 
| Fats/Sauces | Butter, oils, mayonnaise, smooth gravies, smooth sauces | Chunky sauces, relishes, pickles, mustard with seeds | 
| Snacks/Sweets | Plain cakes/cookies, clear jelly, smooth yogurt, ice cream | Popcorn, coconut, nuts, seeds, dried fruit | 
Sample Non-Fibre Meal Plan
A sample day on this diet could include Cornflakes with milk and a banana for breakfast, a turkey sandwich on white bread with canned peaches for lunch, and baked fish with mashed potatoes and cooked carrots for dinner. Snacks might include plain crackers with smooth peanut butter, yogurt, or applesauce.
This diet is restrictive and for short-term use. Extended use may require supplements and should be guided by a healthcare professional.
Conclusion
A non-fibre diet is a temporary plan to ease digestive symptoms by reducing residue in the bowels. It focuses on easily digestible foods. Always consult a healthcare provider before starting this diet and for guidance on reintroducing fibre. For more authoritative information, refer to resources like the Mayo Clinic.