Help & Guidance — Purple Haze MK
Can CBD Oil Cause Constipation?
CBD oil is unlikely to cause constipation and preliminary research suggests it may actually support healthy digestion. Here is what the current evidence shows and what to watch out for in the products you buy.
There is currently no scientific evidence that CBD oil directly causes constipation. In fact, preliminary research suggests the opposite: CBD interacts with the endocannabinoid system in a way that may support gut motility and healthy digestion. If you experience constipation while using a CBD product, the more likely culprits are carrier oils, additives or other ingredients in the product rather than the CBD itself.
How CBD Interacts with the Digestive System
CBD (cannabidiol) interacts with the body's endocannabinoid system (ECS), a network of receptors that regulates a wide range of functions including mood, appetite, pain response and crucially, digestion. CB1 and CB2 receptors are found throughout the gastrointestinal tract, meaning cannabinoids can directly influence gut function.
Research published in 2016 found that CBD may help promote healthy gut motility and reduce symptoms such as abdominal pain and inflammation in animal models. A related cannabinoid, CBG, was found in a 2018 study to activate CB1 receptors in the colon, which are involved in moving food and waste through the digestive system. While human trials are still limited, the current direction of research points toward CBD having a broadly positive or neutral effect on digestion rather than a negative one.
High doses of CBD have in some cases been associated with the opposite problem of constipation: loose stools. This is consistent with CBD's interaction with gut motility rather than any tendency to slow the bowel.
Studies that have proven CBD oil directly causes constipation
The endocannabinoid system, which regulates digestion and is directly influenced by CBD
The more likely cause of digestive discomfort when using CBD products
What Actually Causes Digestive Issues in CBD Products?
When users report constipation or digestive discomfort after taking a CBD product, the cause is almost always something other than the CBD itself. Here are the most common culprits.
| Ingredient or factor | How it may cause issues | Risk level |
|---|---|---|
| Carrier oils (coconut, MCT) | High doses of MCT or coconut oil can cause digestive upset in some people, particularly those with sensitive stomachs | Moderate |
| Additives: carrageenan, guar gum | Common thickeners and stabilisers that can irritate the gut and slow motility in sensitive individuals | Moderate |
| Inulin (prebiotic fibre) | Found in some CBD gummies and capsules, inulin causes bloating and digestive discomfort in some people | Moderate |
| Low hydration | The most common cause of constipation regardless of any supplement use | High |
| CBD itself at standard doses | No evidence of causing constipation at normal consumer doses | Very low |
| Very high CBD doses | Some evidence of loose stools at very high doses, the opposite of constipation | Not applicable |
How to Avoid Digestive Issues When Using CBD Oil
If you are experiencing digestive discomfort after starting CBD, the following steps can help you identify and resolve the issue without necessarily stopping your CBD use.
- Start with a low dose and increase gradually, giving your digestive system time to adjust
- Read the full ingredient list on any CBD product and avoid those containing carrageenan, inulin or guar gum if you have a sensitive gut
- Try switching to a different product format, for example from a gummy to a sublingual oil, as the carrier and additives differ significantly between formats
- Ensure you are drinking enough water throughout the day, as dehydration is the most common cause of constipation regardless of supplement use
- Maintain adequate dietary fibre from natural sources such as vegetables, pulses and whole grains
- If symptoms persist after switching products, speak to your GP before continuing use
If you are looking for CBD products in Milton Keynes, Purple Haze MK stocks a range of high-quality compliant options and our team can help you choose a product with clean, simple ingredients.
CBD oil taken under the tongue (sublingually) bypasses the digestive tract almost entirely, entering the bloodstream directly through the mucous membranes. This delivery method is significantly less likely to cause any digestive side effects compared to edibles or capsules.
Part of Our Guide
Help & Guidance Centre
This article is part of the Purple Haze MK Help and Guidance Centre, our resource covering CBD products, vaping and UK health topics. Browse all topics in the Help and Guidance Centre for clear, balanced information.
For more guidance on CBD products and their effects, visit the Purple Haze MK Help and Guidance Centre.
Frequently Asked Questions
Does CBD oil affect bowel movements?
CBD interacts with receptors in the gastrointestinal tract through the endocannabinoid system. Current evidence suggests it may support healthy gut motility rather than hinder it. At very high doses, some users report looser stools, but constipation is not a recognised side effect of CBD itself.
Can CBD gummies cause constipation?
CBD gummies are more likely to cause digestive issues than sublingual oil because they must pass through the digestive system and typically contain additional ingredients such as gelling agents, sweeteners and prebiotic fibres. If you experience constipation after using CBD gummies, check the ingredient list for carrageenan, inulin or guar gum and consider switching to a simpler product format.
What are the digestive side effects of CBD oil?
The most commonly reported digestive side effects of CBD oil are mild nausea and loose stools when starting out or using high doses. Constipation is not a commonly reported side effect. Most users experience no digestive side effects at all, particularly when using sublingual oils at appropriate doses.
Should I stop taking CBD if I become constipated?
Not necessarily. Consider switching to a different product format or a brand with a simpler ingredient list first, as the additives in your current product are more likely to be the cause. If digestive symptoms persist after switching, stop use and consult your GP.
Related Articles
For more on CBD and health, visit the Purple Haze MK Help and Guidance Centre.
CBD Products in Milton Keynes
Find Quality CBD at Purple Haze MK
We stock a carefully selected range of compliant CBD products in-store at Milton Keynes Market. Our team can help you find the right product and format for your needs.