CBD and Crohn’s Disease UK: What Does the Research Show?
Can CBD Help Crohn’s Disease?
Current evidence does not establish ordinary CBD oil as a treatment for Crohn’s disease.
Cannabinoids have been studied in people with Crohn’s, and some trials have produced interesting results. But it is particularly important to distinguish studies of pure CBD from studies of cannabis products containing both CBD and THC.
In the main randomized trial investigating pure CBD in active Crohn’s disease, CBD did not outperform placebo.
A later trial using a CBD-rich cannabis oil containing THC reported improvements in symptoms and quality of life, but importantly it did not improve endoscopic inflammation or important inflammatory markers. Read the pure-CBD Crohn’s trial on PubMed.
That means the evidence is considerably more complicated than saying CBD “reduces Crohn’s inflammation” or “controls flare-ups.”
Crohn’s & Colitis UK currently says there is not enough evidence to support cannabis-based products or CBD as a treatment for Crohn’s or Colitis, and they are not currently recommended. Read Crohn’s & Colitis UK guidance.
What Is Crohn’s Disease?
Crohn’s disease is a long-term inflammatory bowel disease that causes inflammation within the digestive system.
Symptoms can include diarrhoea, abdominal pain, tiredness, weight loss and blood or mucus in the stool, although symptoms and severity vary considerably between people.
There is currently no cure, but established treatments can reduce inflammation, manage symptoms and help people remain in remission. NHS treatments can include steroids and other anti-inflammatory medicines, immunosuppressants, biological therapies, nutritional treatment and sometimes surgery. Read NHS information about Crohn’s disease.
Why Have CBD and Cannabis Been Studied in Crohn’s Disease?
The digestive system contains parts of the body's endocannabinoid signalling system, and cannabinoids can interact with several biological pathways involved in immune function, pain, gastrointestinal activity and inflammation.
Laboratory and animal research has therefore provided reasons to investigate cannabinoids in inflammatory bowel disease.
But a biological mechanism is only the beginning of the research process.
Evidence that CBD changes inflammatory signalling in cells or animals cannot establish that retail CBD oil reduces intestinal inflammation in somebody with Crohn’s disease.
Human clinical trials are needed to answer that question.
What Did the Pure-CBD Crohn’s Trial Find?
A randomized placebo-controlled study published in 2017 enrolled 20 people with moderately active Crohn’s disease who had not responded adequately to conventional treatment.
Participants received either 10mg of CBD twice daily or placebo for eight weeks.
Nineteen participants completed the trial.
Disease-activity scores improved in both groups, but there was no significant difference between CBD and placebo.
The researchers concluded that low-dose CBD was safe in this small study but had no beneficial effect on Crohn’s disease. They noted that the small number of participants and the particular CBD dose were limitations. Read the study on PubMed.
This was a research dose under clinical conditions.
It should not be converted into consumer dosing advice.
What Did the CBD-Rich Cannabis Trial Find?
A later randomized controlled trial published in 2021 involved 56 people with Crohn’s disease.
This study is sometimes described simply as a “CBD study,” but the formulation actually contained 160mg/ml CBD and 40mg/ml THC.
So this was a CBD-rich cannabis medicine containing THC, not CBD isolate.
After eight weeks, the cannabis group showed greater improvements in Crohn’s Disease Activity Index scores and quality-of-life measures than the placebo group.
That sounds encouraging.
But when researchers looked for objective evidence that the underlying intestinal inflammation had improved, the result was very different.
There was no significant improvement in endoscopic scores, and inflammatory markers including C-reactive protein and faecal calprotectin remained unchanged. Read the 2021 randomized trial on PubMed.
The researchers therefore concluded that the treatment produced clinical and quality-of-life improvements without significant changes in inflammatory parameters or endoscopic inflammation, and recommended that cannabis treatment for Crohn’s remain within clinical trials until further evidence becomes available.
Why Symptoms and Intestinal Inflammation Are Not the Same Thing
This distinction is extremely important in Crohn’s disease.
Somebody may experience changes in pain, appetite, wellbeing or other symptoms without the underlying intestinal inflammation actually being controlled.
That matters because persistent inflammation can cause complications even when somebody temporarily feels better.
So a study showing better symptom scores should not automatically be described as showing that CBD “heals the gut,” “reduces flare-ups” or “controls Crohn’s inflammation.”
The 2021 trial illustrates exactly why those outcomes need to be assessed separately.
What Does the Newer Research Say?
A 2025 systematic review and meta-analysis combined randomized research involving cannabis-based interventions in Crohn’s disease.
The analysis reported possible benefits in some clinical outcomes, but it also highlighted the small evidence base and the need for larger, standardized studies before firm conclusions can be drawn.
Importantly, this analysis was about cannabis/cannabinoid interventions generally.
It cannot be interpreted as evidence that ordinary retail CBD isolate has been proven effective for Crohn’s disease. Read the 2025 review on PubMed.
Does CBD Reduce Crohn’s Inflammation?
Current human evidence does not establish retail CBD oil as a treatment for intestinal inflammation in Crohn’s disease.
The pure-CBD randomized trial did not show a clinical benefit over placebo.
The later CBD-rich cannabis study improved certain symptom measures but did not significantly improve endoscopic inflammation, CRP or calprotectin.
Laboratory research into inflammatory pathways remains scientifically interesting, but it should not be converted into a claim that Valley CBD oil reduces Crohn’s inflammation.
Our separate CBD and Inflammation UK article looks more broadly at human and preclinical inflammation research.
Can CBD Reduce Crohn’s Flare-Ups?
There is currently not enough evidence to state that ordinary CBD oil prevents or reduces Crohn’s flare-ups.
A flare involves disease activity and needs appropriate assessment and treatment.
Someone who thinks they are experiencing a Crohn’s flare should follow the advice given by their IBD healthcare team rather than replacing established care with a CBD product.
What About CBD for Crohn’s Pain or Nausea?
Pain, nausea, appetite changes and other symptoms have appeared in cannabinoid research and are commonly discussed by people living with Crohn’s disease.
But that does not establish retail CBD as a treatment for those symptoms.
Research involving THC-containing cannabis preparations, prescription cannabinoids or particular clinical populations should not be presented as evidence that CBD isolate produces the same outcome.
This is why the old statement that high-strength CBD is a “known analgesic” capable of dampening Crohn’s pain signals should be removed entirely.
CBD, Crohn’s Disease and the Gut Microbiome
Researchers are also increasingly interested in the relationship between cannabinoid signalling and the gut microbiome.
But human evidence is still very limited.
Our separate CBD and Gut Health UK article examines microbiome research specifically rather than using microbiome theories as proof that CBD treats Crohn’s disease.
This gives the two articles clearly different jobs.
Is High-Strength CBD Better for Crohn’s Disease?
There is no good clinical evidence that a high-concentration retail CBD oil is more effective for Crohn’s disease than a lower concentration simply because it contains more CBD per millilitre.
CBD strength describes concentration.
It does not demonstrate Crohn’s disease effectiveness.
The research doses used in Crohn’s trials should also not be converted into instructions to use high-strength retail CBD.
Is CBD Isolate Better for Crohn’s Disease?
There is no clinical evidence showing that CBD isolate is superior for Crohn’s disease.
CBD isolate simply describes the cannabinoid ingredient used in a product.
The current article claims that full-spectrum oils contain plant compounds that may irritate a Crohn’s sufferer's gut while Valley isolate is cleaner, gentler and has greater absorption potential.
We should remove those statements.
There is not adequate evidence to tell somebody with Crohn’s that CBD isolate is medically better for their digestive condition.
Does “Non-Bitter” CBD Make It Better for Crohn’s?
Taste and flavour are product characteristics.
If an oil tastes less bitter, that can certainly affect someone's experience of taking the product.
But non-bitter does not mean clinically more suitable for Crohn’s disease.
We should therefore keep flavour claims separate from medical or digestive claims.
CBD and Crohn’s Medication
People with Crohn’s may take medicines including steroids, immunosuppressants, biologic therapies and other treatments.
Current FSA guidance says CBD can interact with certain medicines and advises people taking any medication not to consume CBD unless under medical direction.
The FSA also advises people with underlying health conditions to avoid consuming CBD unless under medical direction. Read current FSA guidance.
That is particularly important on a Crohn’s article.
A retailer should not tell somebody using Crohn’s medication that combining it with CBD is safe.
What Does Crohn’s & Colitis UK Say About CBD?
Crohn’s & Colitis UK acknowledges that some people report improvements in symptoms or quality of life from cannabis-based products.
But its current guidance says there is not enough evidence to support cannabis-based medicines as a treatment for Crohn’s or Colitis.
Its food guidance similarly says we do not yet know enough about whether cannabis or CBD works or what constitutes a safe amount for people with these conditions, and CBD is not currently recommended for people with Crohn’s or Colitis. Read Crohn’s & Colitis UK food guidance.
It also advises people considering complementary products to tell their IBD team and to continue their prescribed Crohn’s or Colitis medication.
What Does the FSA Say?
The Food Standards Agency's current guidance, published 22 June 2026, says CBD foods have no authorised health claims.
Claims that CBD food products relieve pain, improve sleep or treat illness are not permitted under UK regulations.
For healthy adults, the FSA currently advises a maximum CBD intake of 10mg per day.
However, this should not be treated as a recommendation for somebody with Crohn’s disease. The FSA separately advises people with underlying health conditions or people taking medication to avoid CBD unless under medical direction.
Frequently Asked Questions
Can CBD help Crohn’s disease?
Human research has investigated CBD and cannabis in Crohn’s disease, but current evidence does not establish ordinary retail CBD oil as an effective Crohn’s treatment.
Did pure CBD work in a Crohn’s trial?
A small randomized study using 10mg CBD twice daily for eight weeks found no significant benefit over placebo.
Why did another Crohn’s study report improvement?
A later study used a cannabis oil containing both CBD and THC. Participants reported improvements in disease-activity and quality-of-life scores, but objective endoscopic inflammation and inflammatory markers did not significantly improve.
Does CBD reduce intestinal inflammation?
This has not been established for retail CBD oil in people with Crohn’s disease.
Can CBD prevent a Crohn’s flare?
There is not enough evidence to recommend CBD for preventing or treating Crohn’s flare-ups.
Is CBD isolate better for Crohn’s?
No clinical evidence establishes CBD isolate as superior for treating Crohn’s disease.
How much CBD should someone with Crohn’s take?
There is no established retail CBD treatment dose for Crohn’s disease. Current FSA guidance advises people with underlying health conditions or taking medication to avoid CBD unless under medical direction.
Can CBD replace Crohn’s medication?
No. CBD food supplements should not replace prescribed Crohn’s treatment.
The Bottom Line
Cannabinoids and Crohn’s disease remain legitimate areas of scientific research.
But the human findings require careful interpretation.
The main randomized pure-CBD trial found no benefit over placebo.
A later CBD-rich cannabis trial containing THC reported improvements in symptoms and quality of life, but did not demonstrate significant improvements in endoscopic inflammation, CRP or faecal calprotectin.
Crohn’s & Colitis UK therefore does not currently recommend CBD or cannabis-based products as a Crohn’s or Colitis treatment.
So the evidence supports saying:
CBD and other cannabinoids continue to be researched in Crohn’s disease.
It does not support saying:
Valley CBD oil reduces Crohn’s inflammation, controls flare-ups or treats Crohn’s symptoms.
This article is for general educational information only and is not medical advice. Valley CBD food supplements are not intended to diagnose, treat, cure or prevent disease.