Key Takeaways:
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CBD (cannabidiol) oil is a concentrated form of CBD mixed with a carrier oil, usually MCT (coconut) oil, and is intended to be taken under the tongue.
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CBD oil has a quicker onset time than CBD gummies because it enters the bloodstream directly, bypassing the digestive system.
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Taking CBD with a meal that contains healthy fats can improve absorption and shorten the time it takes to have an effect.
When used under the tongue, CBD (cannabidiol) oil can promote relaxation and calm and reduce stress by interacting with the endocannabinoid system. Classified by the Food Standards Agency (FSA) as a Novel Food, CBD oil can only contain trace or zero levels of THC (tetrahydrocannabinol), so it won’t get you high or become addictive.
How long it takes for CBD oil to work and how long it stays in your body depend on various factors, including your individual metabolism and body composition. But generally, it will take about 15 to 30 minutes for you to feel the effects of CBD oil.
How CBD oil moves through the body
CBD is one of more than 100 cannabinoids identified in the cannabis plant. Despite its association with cannabis, CBD doesn’t have a psychoactive effect, so it won’t get you high, and it’s non-addictive.
Tetrahydrocannabinol, or THC, is another cannabinoid extracted from the cannabis plant. THC does have psychoactive effects, will get you high and can be addictive. CBD is usually extracted from the hemp plant, a relative of the cannabis plant, bred to contain trace or zero levels of THC.
CBD is thought to have numerous benefits, including promoting a feeling of calm and relaxation, supporting better sleep and reducing anxiety and chronic pain.
For CBD to have an effect, it needs to enter the bloodstream. CBD oil is designed to be used under the tongue and enter the bloodstream directly. Other CBD products, such as gummies, need to enter the digestive system before entering the bloodstream, so they take a little longer to have an effect.
How long it takes for CBD to have an effect and how long it stays in the body depends on its bioavailability and its half-life.
Key terms: bioavailability and half-life
The bioavailability of CBD refers to the rate and the percentage at which it enters the bloodstream. As we’ll see in this article, CBD oil has a higher bioavailability than other CBD products, such as gummies.
The half-life of CBD describes the time required for its concentration in the bloodstream to decrease by 50%, and therefore refers to the time taken for it to leave your bloodstream.
The role of the endocannabinoid system
The endocannabinoid system (ECS) is a network of cells and receptors that runs from the brain throughout the body. It plays an important role in homeostasis, the body’s internal checks-and-balances system and helps to monitor and regulate:
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Sleep patterns
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Mood
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Appetite
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Stress
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Immunity
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Pain perception
Endocannabinoids are naturally occurring chemicals that interact with specific receptors on the ECS.
The body releases endocannabinoids in response to stimuli such as stress, pain, and hunger, which interact with the ECS to signal that action is needed, such as releasing a stress hormone. But endocannabinoids deplete, meaning their effect wears off.
CBD does not bind strongly to the CB1 and CB2 receptors in the way THC does. Instead, research suggests it works indirectly. It acts as a negative allosteric modulator at CB1, meaning it changes how the receptor responds rather than switching it on, and it slows the breakdown of anandamide, one of the body's own endocannabinoids, by inhibiting the FAAH enzyme.
CBD also interacts with serotonin 5-HT1A and TRPV1 receptors, which is thought to contribute to its effects on mood and pain perception.
How long does CBD oil take to work?
How quickly you feel the effects of CBD will depend on various factors, including your metabolism and the type of CBD you’re using (see below). But how you take CBD also affects its onset time.
Taken under the tongue (sublingual)
CBD oil contains concentrated CBD mixed with a carrier oil, usually MCT (coconut) oil, and usually comes in a small dropper bottle. It’s designed to be taken sublingually, which means placing a few drops under the tongue and holding it there for a few minutes.
Taking CBD sublingually means it enters the bloodstream directly, bypassing the digestive system and increasing its bioavailability. Therefore, the effects are felt more quickly than taking an edible CBD product. CBD oil typically starts to take effect within 15-30 minutes.
Swallowed and digested
Other CBD products, such as gummies and drinks, that are designed to be swallowed rather than used under the tongue, are a convenient way of dosing CBD and taking it on the go.
However, these products have a slower onset time and lower bioavailability because they pass through the digestive system and then the liver, where a process called first-pass metabolism breaks down a portion of the CBD before it reaches the bloodstream.
The process of first-pass metabolism reduces the concentration of bioavailable CBD. CBD gummies, for example, are swallowed, and when they reach the digestive system, the CBD travels to the liver, where it gets metabolised (broken down) by digestive and cytochrome P450 enzymes.
This process delays the onset of CBD gummies and drinks, usually taking 30 minutes to 2 hours. However, CBD gummies tend to have an effect for longer than CBD oil.
Onset times for other CBD formats
CBD is also available in other formats, including edibles, vapes and skin creams.
Edibles and capsules
Edible CBD products include chocolates, brownies, cakes, teas and coffees infused with CBD. They’re not to be confused with edible cannabis products, such as brownies, that contain THC and are known as ‘edibles’ and designed to get you high.
CBD-infused food and drink, as well as CBD capsules, work in the same way as CBD gummies. They must undergo first-pass metabolism processes before entering the bloodstream, and you feel the effects. Therefore, they’ll also have a 30-minute to two-hour onset time.
Vapes and e-liquids
CBD vapes and e-cigarettes have the fastest onset time as the CBD reaches the lungs, where it gets absorbed directly into the bloodstream.
You can expect to feel the effects of vaping CBD within a couple of minutes. However, vaping isn’t a generally recognised way of gaining benefits from CBD, as e-liquids contain various other chemicals.
The effects of inhaled CBD also tend to dissipate more quickly than ingested CBD.
Balms and topical creams
Topical CBD products are designed to be applied to the skin to soothe aches and provide localised pain relief. They tend not to enter the bloodstream; instead, they act on pain receptors in the skin. CBD creams, balms, and muscle rubs tend to have an effect in about 10 to 20 minutes.
How long do the effects of CBD oil last?
Just like different types of CBD products mean you’ll feel the effects in varying amounts of time, how long the effects last also varies:
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CBD oil: 6 to 8 hours
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CBD gummies and other edibles: up to 12 hours
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CBD drinks: 2 to 6 hours
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CBD vapes: 2 to 4 hours
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CBD skin creams: up to 6 hours
What affects how quickly CBD oil works
Every body is slightly different, and how quickly CBD oil works for you will depend on various factors.
Method of consumption
How you take CBD will affect its onset time. CBD oil works within 15 to 30 minutes, while edibles such as gummies and drinks can take 30 minutes to 2 hours.
Dose and potency
Taking a higher dose of CBD or using a stronger product might make you feel the effects more quickly, but not all bodies are the same, and reactions may differ. If you’re new to CBD, it’s recommended that you start on a low dose of around 10mg per day to see how it affects you.
Knowing how much CBD to take can be tricky, especially when using CBD oil. Use this handy guide to dosing to understand how much you might need to be taking to maximise the benefits.
Type of extract: full-spectrum, broad-spectrum and isolate
There are three types of CBD that can be used in various types of CBD products (CBD oil, CBD gummies, CBD drinks, etc.).
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Full-spectrum CBD - Contains all of the compounds found in the hemp plant, including trace levels of THC. Full-spectrum CBD also contains naturally occurring plant compounds called terpenes and flavonoids. Terpenes are the essential oils responsible for giving plants their individually distinctive aromas and may have anti-inflammatory properties. Flavonoids are the pigments that give plants their colour and may have antioxidant properties.
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Broad-spectrum CBD - Contains the majority of the compounds found in the hemp plant, including terpenes and flavonoids, with the THC removed.
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CBD isolate - The purest form of CBD, with no terpenes, flavonoids or THC.
In terms of how quickly these different types of CBD have an effect, research suggests that full-spectrum CBD products may be absorbed more quickly and therefore have a quicker effect.
This is due to the entourage effect, a theory that suggests the absorption and potency of CBD are boosted by the presence of terpenes, flavonoids and trace levels of THC.
There's a trade-off, though. A legal UK CBD product contains no more than 1mg of controlled cannabinoids per container, but even those trace amounts can accumulate with regular use of a full-spectrum product, and there's a small chance THC shows up on a drug test.
If drug testing is a concern for you Goodrays CBD products are made with CBD isolate and avoid the issue.
Body composition and metabolism
Your individual body weight, body composition and metabolism will dictate how quickly you feel an effect from taking CBD. If you have a higher body weight, you may need a higher dose of CBD to feel the effects. Similarly, if you have a fast metabolism, you may feel the effects sooner.
Taking CBD with or without food
Taking CBD on an empty stomach may speed up the rate at which it’s metabolised and reaches the bloodstream. But the amount absorbed by the body may be reduced. Taking CBD at the same time as eating a meal, or shortly after, is thought to increase the amount of CBD absorbed by the body and therefore increase its effects.
Meals rich in healthy fats, such as oily fish, nuts, seeds and avocado, are best, as CBD is a fat-soluble molecule and the healthy fats help absorption.
Will CBD oil work the first time you take it?
There's no reason why you shouldn't feel any benefits from CBD when you first start taking it. The effects may be subtle, so when you start, take some time to tune in to your body and see how you feel. If you’re new to CBD, start on a low dose of 10 mg per day.
How to help CBD oil work faster
Taking CBD oil with or shortly after a meal containing healthy fats can increase the rate of absorption, as CBD is a fat-soluble molecule.
How long does CBD stay in your system?
CBD can stay in the body for roughly two to five days, and in heavy users considerably longer, although you'll stop feeling anything long before it clears. The gap between the two is easy to confuse.
Onset is about how fast CBD reaches the bloodstream. Half-life is about how long the body takes to clear it.
Sublingual CBD oil is quick to arrive and, for most people, its noticeable effects fade after six to eight hours, but detectable traces linger for days afterwards.
Why your CBD oil might not be working
If you're not feeling any effects from CBD oil, first check the strength of the product and how you're taking it.
Bear in mind the FSA's 10mg daily guidance for healthy adults when considering any change to your dose, and speak to a pharmacist or GP if you're taking other medication.
Also, if you’re using CBD oil, hold it under your tongue for a bit longer to help it absorb into your bloodstream.
Safety, side effects and interactions
According to the World Health Organisation (WHO), CBD is generally considered safe for most people. It doesn’t cause any significant side effects. However, some people may experience a dry mouth, decreased appetite, dizziness and diarrhoea if they take higher doses.
More Information
This article goes deeper into the effects of CBD and how long it stays in your system, while this one discusses how CBD makes you feel and examines common misconceptions about CBD and how it can be confused with THC.
The British Journal of Clinical Pharmacology (BJCP) publishes extensive research on CBD. This 2019 study concluded that CBD has a wide range of potential benefits and uses, and that further research is needed to fully understand these benefits.
References
MacKinnon, L. (2025b, April 30). How long does CBD take to work, and how long does it stay in your system? Releaf. https://releaf.co.uk/education/cannabis-101/cbd/factors-that-affect-how-long-cbd-stays-in-your-system
Wilde, G. (2026, April 4). Can food impact CBD absorption and effectiveness? Unspun. https://beunspun.co.uk/blogs/news/can-food-impact-cbd-absorption-and-effectiveness
Lu, H., & Mackie, K. (2020). Review of the endocannabinoid system. Biological Psychiatry Cognitive Neuroscience and Neuroimaging, 6(6), 607–615. https://doi.org/10.1016/j.bpsc.2020.07.016
This article is for informational purposes only and does not constitute legal or medical advice. Please consult your healthcare provider before starting any new supplement, especially if you are pregnant, breastfeeding or taking other medications.
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