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cbd oil and ibs

Is CBD Oil Beneficial For IBS Symptoms?

Cannabidiol aka CBD oil, is a popular natural remedy for many health problems. But does CBD oil help IBS symptoms?

In this article, I am going to explain the background behind the CBD oil claims. I will also advise you on whether you should be taking this supplement for your IBS.

CBD oil IBS treatment

What Is CBD Oil?

CBD oil is extracted and separated from hemp. It is made up of 85 chemicals known as cannabinoids which can also be found in the cannabis plant (3).

The Hemp plant is a cousin to the Marjuana plant (one of hundreds).

How Do Cannabinoids Affect the Gut?

The digestive system has many cannabinoid receptors in it. There are also many receptors along the gut-brain axis (1).

Cannabinoid receptors can interact with cannabinoid. This results in changes to how the digestive system works (2).

Activation of certain cannabinoid receptors can reduce motility (movement), limit secretion and decrease hypersensitivity in the gut (2).

Cannabinoids and IBS

We know that gut motility and hypersensitivity are two issues which cause symptoms in IBS. We also know that the gut-brain axis pays a huge role.

Unfortunately, there are hardly any studies looking at cannabinoid use in IBS.

There was one interesting study which looked at 75 individuals with varying types of IBS (5). Researchers gave the individuals dronabinol (a type of cannabinoid). Those with IBS-D had an improvement in their gut motility.

Whilst this study is interesting, they only tested individuals before and after a 1000kcal meal. So there are no long-term findings. This makes it impossible to predict how useful the results would be if take into account for the long-term management of IBS.

Will CBD Oil Help My IBS Symptoms?

At present there are no studies to support the claims that CBD oil will help IBS symptoms.

Whilst we know that there are cannabinoid receptors in the gut, it is unclear whether targeting these will manage IBS symptoms.

It is also unclear as to what CBD oil dose / type or strength you would need. Or even how often you would need to take it.

Like with everything in life, there will always be a placebo effect. So we careful this doesn’t cost you a lot of money for a product which has no scientific backing.

Are Cannabinoids Used in Other Areas of Medicine?

Cannabis is currently used for adults suffering with nausea and vomiting due to chemotherapy (6).


Whilst the use of cannabinoids in the management of IBS looks promising, further research is needed.

The use of CBD oil has no scientific proof behind it meaning that we don’t know if it works, what dose you should take, how often it should be take or even any potential longer term harm.

About Kirsten Jackson Specialist Dietitian

Kirsten Jackson is a UK registered Consultant Gastroenterology Dietitian and founder of The Food Treatment Clinic. She has undergone many qualifications to get where she is today, including a UK BSc Honours Degree in Dietetics and Post-Graduate Certificate in Advanced Dietetics. In addition to this, she has FODMAP Training from Kings College London University. Kirsten set up The Food Treatment Clinic in 2015 after first experiencing digestive problems herself. She felt that the NHS was unable to provide the support individuals needed and went on to specialise in this area before opening a bespoke IBS service. Kirsten also participates in charity work as an Expert Advisor for the IBS Network. In addition, she can be seen in publications such as Cosmopolitan and The Telegraph discussing IBS as an Official Media Spokesperson to the IBS Network.

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Cannabidiol aka CBD oil, is a popular natural remedy for many health problems. What is CPD oil and does it help treat IBS symptoms?

CBD for IBS: Everything You Need to Know

IBS is frustrating. There are few effective treatments for the condition, which can make it hard to live your life to the fullest.

Here’s how CBD might be able to help.

Article By

Irritable bowel syndrome (IBS) is not life-threatening, but it can severely disrupt the quality of life for those affected.

Roughly 1 out of 10 people in the developed world have symptoms consistent with IBS [3].

Despite how common the condition is, IBS is not well understood. As a result, there are few effective treatment options available aside from managing symptoms.

Here we’ll go over how CBD may be used to support an IBS diagnosis, how to use it, what its limitations are, and how to get the most out of it with other diet and lifestyld modifications.


Updated on November 07, 2020

Table of Contents
  • Best CBD Oils For IBS
  • The Benefits of CBD Oil For IBS
  • What Form of CBD Should I Use?
  • What’s The Dose of CBD Oil For IBS?
    • CBD Dosage Calculator
  • How to Get The Most Out of CBD Oil For IBS
  • What is CBD Oil?
  • What is Irritable Bowel Syndrome?
    • IBS Diagnosis: The Rome III Criteria Checklist
    • Symptoms of Irritable Bowel Syndrome:
  • 3 Types of IBS & the Effects of CBD
    • 1. Diarrhea-Dominant IBS (IBS-D)
    • 2. Constipation-Dominant IBS (IBS-C)
    • 3. Alternating IBS (IBS-A) or Mixed-type IBS (IBS-M)
  • What Causes IBS?
    • 1. Diet
    • 2. Viral Infection
    • 3. Neurological Dysfunction
      • Neurological Characteristics of IBS and Related Side-Effects:
    • 4. Inflammation
  • The Endocannabinoid System & IBS
    • CBD for Other Functional Disorders
  • Key Takeaways: Using CBD for IBS
  • References Cited in This Article
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    The Benefits of CBD Oil For IBS

    There are many potential causes for IBS, but much of what triggers the condition remains unknown. Most of the causes point to a loss of equilibrium in the digestive tract. So the carefully orchestrated balance involved with digestion, absorption, immune defense, and excretion is compromised.

    Cannabidiol (CBD) helps with this problem because it serves as a way to “calibrate” different parts of the body. It does this by improving the communication between cells through the endocannabinoid system.

    The benefits of CBD oil for IBS Include:

    • Addresses anandamide deficiencies [13]
    • Reduces inflammation [7, 8]
    • Inhibits digestive muscle hyperactivity and cramping [5, 6]
    • Decreases appetite [9]

    CBD will affect the condition differently depending on the form of IBS.

    People who have IBS with diarrhea (IBS-D) are likely to experience the most benefit from CBD because cannabis slows muscle contraction in the digestive tract.

    But people who have IBS with constipation (IBS-C) can still find benefit from CBD due to the anti-inflammatory, appetite-suppressant, and immune-stimulating properties of the compound.

    We’ll get into the different forms of IBS and how CBD is used to support them later on.

    What Form of CBD Should I Use?

    CBD comes in all different forms. You can buy oils, capsules and concentrates.

    When it comes to IBS, the most popular options are oils, capsules, and suppositories.

    CBD oils and capsules are easy to take, to store for long periods of time, and can be accurately dosed.

    Suppositories have the benefit of delivering the CBD directly to the affected area. This is best for severe IBS-D (more on this below) but can benefit other forms of IBS as well.

    What’s The Dose of CBD Oil For IBS?

    Dosing CBD can be a challenge because it affects everybody differently.

    Some people take 50 mg of CBD per day, while others need more or less.

    The dose also depends on the form of CBD you’re taking. As we mentioned, CBD oil and suppositories are the most popular for people with IBS, but the dose for each form varies significantly.

    If using oils or capsules, the best way to find a good starting dose it to read through our CBD oil dosing guide.

    CBD Dosage Calculator

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    For IBS, we recommend starting at the low strength and working your way up slowly to see how you react to CBD.

    It will likely take about two or three weeks of regular CBD use before you start noticing any real benefits for your IBS symptoms.

    If using CBD suppositories, it’s best to follow the specific instructions listed by the supplier on the packaging. Concentrations can vary from one CBD suppository to the next.

    How to Get The Most Out of CBD Oil For IBS

    CBD shouldn’t be used alone to treat IBS. This condition is highly complex and involves multiple organ systems.

    Other forms of treatment, including dietary changes and physical activity, are essential. If these lifestyle changes aren’t addressed, CBD is not likely to have any effect at all.

    You can think of CBD as a bus driver — it will drive the occupants towards a destination, but they can’t arrive without a well-maintained bus filled with gas.

    CBD is a tool to help alleviate uncomfortable symptoms of IBS and is used to bring the body back to balance.

    What is CBD Oil?

    CBD stands for cannabidiol. It’s one of the primary cannabinoids in the cannabis plant.

    Most CBD oils on the market today come from the hemp plant (Cannabis sativa), which is a strain of cannabis naturally low on THC — the primary psychoactive cannabinoid.

    This means that most CBD products on the market have no psychoactive effects.

    CBD is used as a health supplement for a wide range of medical conditions. It owes much of its ability to support health to its involvement with the endocannabinoid system.

    The endocannabinoid system regulates balance in the body, otherwise known as homeostasis. This includes the immune, digestive, neurological, musculoskeletal, and integumentary (skin) systems.

    What is Irritable Bowel Syndrome?

    Irritable bowel syndrome (or IBS) is classified as a syndrome, rather than a disease because it’s a set of symptoms that can’t be linked to a particular cause.

    IBS can be summarized as a “widespread dysfunction of the digestive tract.”

    Symptoms involve bloating, abdominal pain, indigestion, and changes in bowel movements (constipation or diarrhea, which can be severe).

    The symptoms of IBS are very similar to those of inflammatory bowel disease (IBD). The difference is that IBD has inflammation present in the gastrointestinal tract, confirmed by Lab tests and special cameras inserted in the digestive system.

    If no inflammation is present to confirm a diagnosis of IBD, an IBS diagnosis is given instead.

    In this process, there are some diagnostic criteria put in place by various experts, but none of them are conclusive and not all doctors agree on them for a diagnosis of IBS.

    The most popular criteria doctors tend to use is something called the Rome III Criteria.

    IBS Diagnosis: The Rome III Criteria Checklist

    In order to meet a diagnosis of IBS, the patient must have the following symptoms:

    • Recurrent abdominal pain or discomfort at least 3 days per month over 3 months
    • Symptoms involving at least two of the following characteristics:
    • Improvement of symptoms with defecation
    • Onset associated with a change in stool frequency
    • Onset associated with a change in stool form

    If these criteria are met and there is no other explanation for a cause (such as inflammation, traumatic damage, or infectious disease) the patient is diagnosed with IBS.

    Symptoms of Irritable Bowel Syndrome:

    • Nausea
    • Abdominal pain
    • Gas
    • Bloating
    • Feelings of “fullness”
    • Constipation/Diarrhea
    • Mucus in the stool
    • Uncontrollable urgency to have a bowel movement
    • Fatigue
    • Weight gain/loss

    3 Types of IBS & the Effects of CBD

    20-50% of visits to a gastroenterologist end in a diagnosis of IBS [3], making it the most common functional disorder of the digestive system.

    Gastroenterologists further classify IBS according to the most predominant symptoms:

    1. Diarrhea-Dominant IBS (IBS-D)

    This refers to IBS presented primarily with diarrhea.

    IBS-D symptoms indicate that the bowels are filling with water. Common precursors for this include high sodium foods, a poor gut membrane, and hyperactive muscle activity in the digestive tract.

    With high sodium foods and poor membrane control, water begins to accumulate in the areas filled with salty foods. This happens because of a principle in biophysics called osmosis: the water goes where the salt is. As the intestines fill up with water, it causes diarrhea.

    Additionally, many people with IBS-D experience hyperactive muscle activity in the intestinal tract. When the muscles become spastic, they experience cramping, abdominal pain, and bloating. The digestive tract pushes food through too quickly without properly breaking it down and absorbing it. Instead, unabsorbed foods begin to ferment in the large intestine, causing severe bloating, nausea, and diarrhea.

    CBD is useful for this type of IBS because it can reduce spastic muscle activity in the gut, allowing it to properly digest and absorb nutrients. For this type of IBS, it’s best to combine CBD with a low-sodium diet and a good source of soluble fiber.

    2. Constipation-Dominant IBS (IBS-C)

    IBS-C stands for IBS presented predominantly with constipation.

    This type of IBS indicates low activity in the digestive tract. Pancreatic enzymes, bile, and stomach acid are scant. These enzymes help break down our food and stimulate the smooth muscle lining our intestines. This stimulation causes the muscles to expand and contract, moving food along the digestive tract.

    If there is a problem with the secretion of digestive enzymes or muscle movement in the intestinal tract, we become constipated.

    This can be extremely uncomfortable, causing symptoms such as severe bloating, feelings of fullness, nausea, fatigue, and physical belly distention.

    Although nothing will produce the same level of benefit as a change in the diet, CBD does offer some unique benefits to this form of IBS.

    CBD increases anandamide — a naturally occurring endocannabinoid responsible for slowing bowel movement, fighting inflammation, and controlling microbiome diversity.

    3. Alternating IBS (IBS-A) or Mixed-type IBS (IBS-M)

    This form of IBS involves alternating bouts of diarrhea and constipation.

    The potential causes of this type of IBS are far more variable and can involve factors of both. For several months, the patient may suffer from constant diarrhea, followed by several months of severe constipation. The sudden changes in bowel activity can be due to dietary, neurological, or immunological factors — making the cause hard to isolate and treat.

    CBD is useful for this type of IBS because it doesn’t push the digestive function in any specific direction. Instead, it improves the body’s ability to regulate homeostasis. Along with other therapies to manage symptoms, the body has a better chance of returning to a higher state of health on its own.

    What Causes IBS?

    The exact cause of IBS is not yet understood — but there are some well-accepted theories in the medical community.

    Suspected Causes of IBS Include:

    1. Diet

    Western countries including Canada, The United States, and Sweden have the highest rates of IBS in the world [11, 12]. In the United States, roughly 1 in 10 people suffer from IBS.

    These nations often consume diets high in processed foods. Foods that have been highly processed tend to have poor nutritional content (in terms of vitamins, antioxidants, minerals) and are high in calories (in the form of fat or sugar).

    When we eat these foods, they tend to move slowly through our digestive tract due to the lack of fiber and bulk of the food.

    The slow movement and high sugar content cause this food to ferment in the digestive tract by bacteria living there. Fermentation in this context is bad for our digestive functioning — it causes bloating, pain, and changes in bowel movements.

    One of the main dietary treatments for IBS is called a low FODMAPS diet, which substitutes highly processed foods for high-fiber, low sugar ones.

    Frequent fermentation of processed sugars can damage the structural integrity of the digestive lining over time — leading to accumulation of fluid and diarrhea (IBS-D) or lack of movement in the muscles in the small and large intestines causing constipation (IBS-C).

    2. Viral Infection

    Viral infections can cause a lot of damage to the body. Many people report their IBS symptoms started shortly after getting a stomach bug overseas. After a few days of illness, they seemed to be getting better, but their gut never fully recovered.

    Viruses disrupt normal cellular function, hijacking our cells to manufacture more viruses and preventing them from their job. They can wreak havoc on an entire organ in a short amount of time.

    The digestive lining is home to a complex ecosystem of bacteria and fungal species called the microbiome. The microbiome is heavily involved with digestion and absorption in the digestive tract. When we fall ill with a virus, this can cause dramatic changes to the microbiome, leaving us with long-lasting side-effects, such as IBS.

    3. Neurological Dysfunction

    The movement of the intestinal tract (called peristalsis) is a complex orchestra of muscle contractions working together to move food through the intestinal tract. This involves careful innervation both locally and in collaboration with the brain.

    Many people find that when they drink coffee, it stimulates a bowel movement. This is a good visualization of how the nervous system affects the digestive tract.

    If our nervous system is in a state of constant stimulation, we are likely to develop diarrhea (IBS-D).

    If we experience the opposite (insufficient stimulation), we are likely to end up with constipation (IBS-C).

    Based on neurological activity, we can compare IBS types with other side-effects that often affect IBS patients at the same time.

    Neurological Characteristics of IBS and Related Side-Effects:
    IBS type Nervous System Activity Related Side-Effects
    IBS-D Too stimulated Anxiety Panic disorders Insomnia Heart palpitations
    IBS-C Not stimulated enough Fatigue Depression
    IBS-A Either too stimulated or not enough Anxiety Panic disorders Insomnia Heart palpitations Fatigue Depression Immune deficiencies

    4. Inflammation

    Although IBS by definition does not require visible or detectable inflammation, numerous studies have shown that IBS sufferers have low-grade inflammation of the gut wall [2]. This inflammation may be too subtle to be picked up by blood tests or visual inspection with colonoscopies/endoscopies.

    The Endocannabinoid System & IBS

    The endocannabinoid system is thought to play a major role in IBS [10].

    The CB1 and CB2 endocannabinoid receptors are used to regulate different processes in the human body — many of which are present in the digestive tract.

    CBD for Other Functional Disorders

    IBS is considered a functional disorder, suggesting there’s a clear problem with the function of the organ without an apparent cause.

    Other conditions that fit this category are fibromyalgia and chronic fatigue syndrome — both of which are also improved with regular CBD use. The mysterious nature of these conditions makes it difficult to pinpoint exactly why CBD is so useful for treating them, but the likely explanation is the role CBD plays in homeostasis.

    Homeostasis is the state of balance in the body. It penetrates virtually every aspect of life — from body temperature to digestive enzyme secretion. Any issues with homeostasis can negatively affect our health.

    CBD serves as a useful tool for regulating homeostasis, which is why this compound has so many different benefits.

    Key Takeaways: Using CBD for IBS

    Although IBS isn’t well understood, it likely involves a combined dysfunction of multiple organ systems, lifestyle habits, and diet — CBD offers broad benefits towards different variations of the condition.

    It’s best to use CBD in the form of an oil, capsule, or suppository for optimal results. It’s also important to take CBD oil for long periods of time to exert its full effects. CBD can take a while to start providing benefits for this condition because there are many factors involved.

    Through persistent CBD supplementation, dietary and lifestyle changes, and patience, IBS symptoms can be forced into remission for long periods of time.

    Research suggests CBD oil can alleviate symptoms of IBS-C & IBS-D. View the best CBD oils for IBS & how to find a safe & effective dose.