The Tamesis
Don’t believe all the constant talk about fiber these days – while crude fiber is an important part of a healthy diet, sometimes the body needs low-residue foods to maintain balance. Low-residue foods are defined as foods that don’t leave much behind after digestion and elimination, and experts break down what low-residue foods are, when it’s wise to eat them, and why they’re important.
What is low-residue food?
Low-residue foods are foods that leave little undigested material (or “residue”) in the gastrointestinal tract after digestion. “In practical terms, this means that dietary fiber is low and the components that increase stool bulk, such as skins, seeds, and tough plant structures, are also low,” says nutritionist and author of ” fiber formula”, explains Rhiannon Lambert.
Some examples of low-residue foods include:
- Refined grains: white bread, white rice, pasta and crackers
- Lean protein: chicken, turkey, fish, eggs, tofu
- Dairy products (if tolerated): milk, yogurt, cheese
- Cooked peeled or seeded vegetables: carrots, zucchini, peeled potatoes
- Ripe or canned fruit without skin or seeds: bananas, melons, applesauce
- Fat: butter, oil, smooth nut butter (a small amount, to taste)
Are low-residue foods and low-fiber foods the same thing?
Not exactly. “All low-residue diets are low in fiber, but not all low-fiber diets are low-residue,” says April Morgan, head of nutrition at Artah. “Residue” includes anything that reaches the colon undigested, which includes fiber, but also connective tissue, lactose (for those with poor digestion), seeds, and other malabsorbed ingredients. Foods may be low in fiber but still produce residue if they irritate the intestines or are poorly absorbed. “
Why eat low-residue foods?
Low-residue diets are really only recommended for short-term use and only under medical supervision. For those who can tolerate high-residue foods, the benefits of eating them are too great to ignore. However, for some people and at certain times, low-residue foods can help:
- acute digestive system disease
- The period immediately after intestinal surgery
- Before having a colonoscopy or certain treatments
- For people whose intestines are significantly narrowed and at risk for obstruction
Morgan explains that the reason low-residue diets are generally not recommended for long-term use is that they may lack “the fiber, prebiotics and plant diversity that support a healthy gut microbiome.” For people without these conditions, a low-residue diet may lead to constipation, reduced microbiome diversity, increased risk of cardiovascular disease, and poor blood sugar regulation.
“Unless there is a medical reason, most people will benefit from a varied, fiber-rich diet that supports normal bowel function,” Morgan concluded.
Can low-residue foods help overall gut function?
Again, not true. While a popular concept online is “cutting out fiber/high residue foods to help gut health”, it doesn’t translate into practice for people who have no medical reason to do so.
“In some emergency situations, temporarily reducing fiber can relieve symptoms and give the gut a chance to settle down,” explains the registered dietitian and show host. Gut 360 Podcast, Eli Brecher. “However, long-term vitality and function often require support from adequate fiber, fluids, exercise and a varied, plant-rich diet.”
Think of low-residue diets as a “short-term clinical tool,” rather than something to optimize gut health long-term, Brecher said. “If you’re struggling with bloating or irregular bowel movements, the focus should be on identifying the underlying cause, such as stress, lack of fiber variety, poor meal times or underlying disease, rather than just cutting fiber broadly without guidance,” she warns.
