IBD Advice Failed Me for Years
When I was diagnosed with inflammatory bowel disease, I was told by a gastroenterology specialist to avoid fibre.
That advice shaped years of my life. It shaped what I ate, how I lived, how often I bled, how often I ended up in hospital, how thin I became, how much pain I thought I had to accept, and how hopeless the future looked.
The logic seemed simple enough: fibre makes the gut work harder, so avoid fibre. Eat low-residue foods. Keep things bland. Stick to white bread. Keep meals easy to digest. Do not irritate the bowel.
So I did what many people do after diagnosis. I listened.
I ate mostly meat, dairy and white bread.
And I suffered for years.
Crohn’s disease and ulcerative colitis are forms of inflammatory bowel disease. They are not a bit of bloating. They are not a sensitive stomach. They are not on the same planet as Irritable bowel syndrome. They are inflammatory conditions that leave people losing blood, losing weight, struggling to absorb nutrients, living with pain, exhaustion, diarrhoea, cramps, hospital admissions, scans, mega doses of corticosteroids, immune suppression, and the constant threat of surgery.
When your bowel is inflamed, ulcerated and damaged, food becomes frightening. Eating becomes a calculation. Leaving the house becomes a calculation. Your own body starts to feel like something you cannot trust.
So when a specialist gives you a rule, you cling to it.
Mine was: avoid fibre.
What I was not told clearly enough was that fibre is not one thing. I was not told that the gut microbiome matters. I was not told that different fibres behave differently. I was not told that blending, soaking, peeling, mashing, boiling, and changing texture can make plant foods easier to tolerate. I was not told that some people may struggle with one bean but tolerate another. I was not told that a narrowed bowel is a different situation from a gut that is inflamed but not obstructed.
I was given a blunt instruction.
My diet became animal products and refined carbohydrates.
The exact kind of diet now increasingly associated with inflammatory disease risk.
For years, I thought I was protecting my bowel by avoiding the very foods that may have helped repair the ecosystem inside it. Then I changed, almost by accident.
At the time, I had been learning more about how destructive the beef and dairy industries are for the environment. I was already facing the possibility of having parts of my bowel removed in the near future, so I reached the point of: what the hell?
I swapped cow’s milk for soya milk. I swapped cow flesh for legume or mushroom-based beef replacement products.
The change was drastic.
That pushed me to read more of the medical literature. The more I read, the more obvious it became that the advice I had been living under was far too simplistic. Eventually, I moved to a fully plant-based diet.
My inflammatory markers improved so much that my specialist was dumbfounded. They were not just better than they had been. They were better than the average person’s.
For the first five years, I was completely symptom-free.
After that, I had a minor flare-up. Over the next five years, I had occasional flare-ups lasting a few weeks. That is not perfection. That is not a miracle cure. That is not a promise to anyone else.
But compared with spending most of my life passing blood several times a day, malnourished, underweight, in agonising pain, and in and out of hospital several times a year, it was a different life.
This is not an article claiming plant-based diets cure Crohn’s disease. Anyone selling certainty around inflammatory bowel disease should be treated with caution. IBD is complicated. People have different disease patterns, different triggers, different levels of bowel damage, different medications, different histories, and different risks. Some people have strictures. Some people need surgery. Some people need biologics. Some people need temporary low-fibre diets during severe flares or narrowing.
But “some people need temporary fibre restriction” is not the same as “fibre is the enemy.”
A large prospective study published in 2025 in Molecular Nutrition & Food Research followed 143,434 UK Biobank participants for an average of 14.5 years. During that period, 1,117 developed inflammatory bowel disease, including 795 cases of ulcerative colitis and 322 cases of Crohn’s disease.
The finding was not that any food with a vegan label protects the gut. It was more specific, and more useful.
A healthy plant-based diet was associated with a reduced risk of IBD. People eating more health-promoting plant foods, including fruit, vegetables and whole grains, had a lower risk of ulcerative colitis and Crohn’s disease. Fruits and vegetables appeared particularly protective. Inflammatory markers, including C-reactive protein, white blood cells and neutrophils, helped explain the association. In plain English: whole plant foods are best. But the study also found that an unhealthy plant-based diet, high in refined grains and oils, was associated with a higher risk of Crohn’s disease.
Plant-based does not automatically mean healthy.
Chips are plant-based. White bread is plant-based. Sugary drinks can be plant-based. Refined oils are plant-based.
The distinction is whole plant foods versus the standard Western pattern of animal protein, animal fat, refined carbohydrates and highly processed products. And that raises a serious question.
Why are so many patients still being pushed away from fibre as if fibre itself is the problem?
Fibre feeds beneficial gut bacteria. Those bacteria produce short-chain fatty acids, including butyrate, which help maintain the gut barrier and regulate inflammation. A gut deprived of fibre is not being rested in any meaningful long-term sense. It may be being starved of the very material it needs to build a healthier microbial environment.
Of course, this has to be handled carefully. Nobody with IBD should be told to shovel down raw kale during a flare and hope for the best. But nuance is not the same as fear. Cooked carrots are not the same as raw cabbage. Blended lentil soup is not the same as a bowl of hard chickpeas. Smooth nut butter is not the same as whole nuts. Peeled fruit is not the same as fruit skins. White bread is not the same as oats. One bean is not the same as another bean. A person with strictures is not the same as a person without strictures.
This is where proper support matters. A dietitian who understands IBD and plant-based nutrition can help someone test foods carefully, keep nutrition adequate, and avoid reckless restriction. An elimination approach can help identify personal triggers without declaring war on an entire food group. The problem is not caution. The problem is blanket rule cautions. The problem is telling sick people to avoid fibre without properly explaining when, why, for how long, which types, in what form, and what the long-term trade-off may be.
The problem is a medical culture that can be extremely confident about removing parts of someone’s bowel, while being weirdly underpowered when discussing the food passing through that bowel every single day.
There is also the animal agriculture question.
Crohn’s disease has been investigated in relation to Mycobacterium avium subspecies paratuberculosis, known as MAP. MAP causes Johne’s disease in cows, a chronic inflammatory intestinal infection. Research has found MAP more often in people with Crohn’s disease than in people without it, although a direct causal link has not been firmly established. MAP has also been detected in cow’s milk and can survive pasteurisation. That does not prove dairy causes Crohn’s. But it does make the cultural obsession with cow’s milk look even more absurd.
We are told cow’s milk is normal. Necessary. Nourishing. A default food. Something humans should pour onto breakfast and into children because marketing made it sacred. But when you step back, it is a secretion taken from another species, produced after reproductive exploitation, tied to an industry with major environmental costs, and potentially relevant to a disease area where many patients are desperate for answers.
My story is not a prescription.
It is a warning.
When I followed the advice to avoid fibre, I got worse. When I replaced dairy and cow flesh with plant-based alternatives and then moved to a plant-based diet, my life changed. And not every meal is whole food and cooked from scratch, that’s the daily goal, but my kitchen has plenty of vegan junk food for the days when I have either no time, life happens, or have symptoms which means I need concentrated calories.
That does not mean every person with Crohn’s will respond the same way. It does mean the old script deserves serious scrutiny.
Patients with IBD deserve better.
They deserve nuance. They deserve up-to-date evidence. They deserve clinicians who can explain the difference between temporary symptom management and long-term gut health. They deserve help building a diet that supports remission, nutrition, dignity and actual life.
“Just avoid fibre” is not good enough.