What new bowel-health research tells us
10g More Fibre, 10% Lower Bowel Cancer Risk?*
BBC Panorama highlighted a striking finding: every additional 10g of fibre eaten per day is associated with around a 10% lower risk of bowel cancer.* Here’s what the evidence means — and what it does not.
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Association, not a promise
What “10g more, 10% lower risk” actually means
Research summarised by Cancer Research UK suggests that bowel-cancer risk is around 10% lower for each additional 10g of total dietary fibre eaten per day.
That is a population-level association. Fibre cannot guarantee prevention, remove cancer cells or treat an existing cancer. Risk is shaped by many factors, including age, genetics, smoking, alcohol, body weight and overall diet.
Cancer Before 50
Three important points from Panorama
Only around 4% of adults reach 30g of fibre a day
In other words, roughly 96% are falling short of the NHS recommended daily amount.
Higher likelihood of precancerous bowel changes in one study
Women under 50 who ate the most ultra-processed food were reported as 45% more likely to develop these changes than those who ate the least.
People will take part in PROSPECT-UK
The King’s College London-led study will explore why bowel cancer is rising in younger adults by examining diet, lifestyle, gut health and environmental factors.
Inside the bowel
How fibre may support bowel health
Helps prevent constipation
Fibre adds bulk and helps stools stay soft enough to pass more easily, supporting regular bowel movements.
Feeds beneficial gut bacteria
Some types of fibre are fermented by gut bacteria, producing compounds including butyrate that help support the bowel lining.
Reduces contact time with harmful substances
By helping stools move through the bowel more quickly, fibre means harmful chemicals in poo spend less time in contact with the bowel.
A four-week demonstration
What happened in the twins experiment
Twin sisters worked towards 30g and 40g of fibre a day. After four weeks, two of the three inflammation markers tested had fallen in both; microbiome health also improved, with the greater change reported at 40g.
This was a short experiment involving two people, not proof that their cancer risk changed. It showed why larger studies such as PROSPECT-UK are important.
Start with the bakery, then build
How to boost your fibre intake with SRSLY
SRSLY bread, rolls and wraps provide a useful fibre base. Add vegetables, avocado, hummus or beans to turn that base into a higher-fibre meal and help work towards 30g across the day.
Avocado and tomato toast
Two slices SRSLY seeded bread: 6g
Half an avocado: about 3.4g
100g tomatoes: about 1.2g
Hummus and salad open roll
One SRSLY bread roll: 8.9g
50g hummus: about 3g
A generous salad topping: about 2g
Bean and cheese wrap
One SRSLY wrap: 6.2g
100g kidney beans: about 6.4g
Peppers and onion: about 0.6g
Three SRSLY meals
= 37.7g FibreThat takes this example day beyond the NHS recommendation for adults to aim for 30g of fibre a day.
Fibre estimates vary by brand, recipe and serving size. Check product labels, increase fibre gradually and drink plenty of fluids.
High fibre. Seriously satisfying.
Make everyday fibre easier
Explore SRSLY bakery favourites for a seriously simple way to bring more fibre to the meals you already enjoy.