If you’ve ever used a CBD oil, you’ve gotten more from the product than just cannabidiol (CBD). For multiple reasons, manufacturers need to put CBD into carrier oils. You should always check the label of your CBD product and know what’s in it.
Many carrier oils are similar, but they may have differences that are important to you for various reasons. Most of them are nut-based or plant-based oils that some people may be allergic to. Others might not taste good to you or, depending on how you’re using the CBD, might irritate your skin.
Benefits of CBD Carrier Oils
You can find CBD products using a bunch of different carrier oils, sometimes alone and sometimes in combinations. They serve several important functions.
One key reason for using a carrier oil is that they improve the bioavailability, which means they help your body absorb the CBD oil. CBD is fat-soluble, which means that it dissolves in oil rather than water. Fat-soluble substances are better absorbed when digested along with fat, even in small amounts.
When you digest water-soluble substances, like sugar or many vitamins and minerals, your digestive tract sends them directly into your bloodstream (because blood is a water-based liquid).
Fat-soluble substances can’t be absorbed this way. Instead, your digestive tract sends them into fatty tissues and they’re distributed through your body by the lymphatic system, which is part of your immune system. Any excess is stored in your liver and fatty tissues for later use.
CBD is a potent chemical, which means you don’t need much of it for a medicinal effect. However, that poses a problem when it comes to dosing. To deliver appropriate and consistent doses, it’s easier to measure out a dropperful of CBD-infused oil than a tiny amount of crystalline isolate (which is CBD in pure form).
Added Health Benefits
Carrier oils may have health benefits all on their own, which you may then benefit from. For example, olive oil has gotten a lot of attention for its heart-healthy benefits.
If there’s an oil you’d like to get more of in your diet, adding it into your CBD regimen is one way to get slightly more. (It’s debatable whether one or two droppersful a day is enough to have any tangible impact on your health.)
Side Effects and Precautions
Most people don’t have side effects from common carrier oils. Some oils, though, may not be right for people with certain illnesses or taking certain medications. Always check with your doctor before adding anything to your treatment regimen—even a “natural” product like CBD in a dietary oil. Natural doesn’t always mean safe.
If you have tree-nut allergies or other food allergies, be especially diligent about selecting CBD products with carrier oils you know are safe for you. All ingredients should be specified on the label.
For topical preparations, know that some carrier oils or other added ingredients may cause an itchy, red rash called allergic contact dermatitis. Others may cause skin reactions to sun exposure. Be sure you’re familiar with the potential side effects of whatever products you’re using.
What About Essential Oils?
Carrier oils aren’t the same thing as essential oils used for aromatherapy. Essential oils are highly concentrated, which is why they have a strong fragrance.
Many essential oils can cause poisoning when ingested or absorbed through the skin, even in small amounts. This is true even if the oil comes from something it’s normally safe to eat, such as nutmeg.
Some topical CBD formulations may include essential oils such as lavender or eucalyptus oils because of their purported health benefits.
Before using these products, be sure you’re familiar with the ingredients and that you’re not allergic to any of them. Watch for side effects, as well.
Common Carrier Oils
Some of the most popular carrier oils are:
MCT oil is the most common carrier oil for CBD products. It can be derived from coconut or palm kernel oil, but coconut is the most common source. On labels, it’s sometimes listed as fractionated coconut oil.
Medium-chain triglycerides are a type of fatty acid that your body can quickly absorb because it doesn’t have to break them down via digestion before sending them off to the lymph system. It also absorbs easily through the skin.
Long-chain triglycerides require more digestion time and short-chain triglycerides are often consumed by gut bacteria before they’ve had time to be absorbed, so MCTs are the most useful.
- Quick absorption due to molecular structure
- 90% saturated fat, which also aids absorption
- Light, thin oil
- Almost flavorless
- Doesn’t require chemical processing
- Less expensive than some carrier oils
- Slow to break down and go rancid
- Temporary digestive side effects in some (nausea, gas, diarrhea, vomiting)
- Possibly, excessive build-up of ketones in the body (dangerous with poorly controlled diabetes)
- Not recommended for people with liver disease
- May interact with cholesterol-lowering statin drugs
Additional Health Claims
Some scientific evidence suggests that MCT oil may:
While promising, much of this research is preliminary and more work is needed before MCT oil can be recommended for these uses.
Hemp Seed Oil
They come from the same plant, but hemp seed oil (sometimes called hemp oil) and CBD oil aren’t the same things. CBD comes from the flower while hemp seed oil, as you probably guessed, comes from the seeds.
The seeds contain fewer beneficial chemicals (cannabinoids and terpenes) than the flower and in much lower concentrations. However, they do contain some hemp phytochemicals that aren’t present in the flowers.
Using hemp seed oil as a carrier oil for CBD may contribute to what’s called the “entourage effect,” which basically means that combining parts of the plant may make each component more effective than it would be alone.
- Lower solvency than MCT oil, meaning it can’t hold as much CBD
- Higher priced than MCT oil
- Flavor (sometimes described as “sharp” or “herby”) may not be to your liking
- Side effects may include diarrhea, nausea, throat irritation, slow heart rate, high blood pressure
Additional Health Claims
Hemp seed has been used medicinally for a wide array of conditions, most of which have not been researched enough to say for sure whether they’re safe and effective.
- Due to anti-inflammatory abilities, it may be useful for treating rheumatoid arthritis.
- It may improve heart health by lowering cholesterol and blood pressure.
- Used topically, hemp seed may reduce acne and other conditions involving skin inflammation.
Olive oil is probably the carrier oil you’re most familiar with and it’s certainly the best researched. It’s become one of the most commonly used cooking oils because of its many well-established health benefits.
- High in iron, vitamin K, vitamin E
- Rich in antioxidants
- Highly researched
- Absorbed by skin even faster than MCT
- Its long-chain triglycerides are slower to absorb than MCT (but may absorb more efficiently)
- Lower solvency than MCT, meaning it can’t hold as much CBD
- Thicker than most other carrier oils, which may be unpleasant
- Flavor is relatively strong and may be distasteful to some
Additional Health Claims
Thanks to a significant amount of research, olive oil is known to:
- Boost immunity
- Reduce inflammation
- Increase good cholesterol and lower bad cholesterol
- Prevent blood platelet clumping, which can cause heart attacks
- Aid in blood clotting
- Improve gut-bacteria balance
- Support proper nerve function
- Prevent cognitive decline
- Protect bones from thinning (osteoporosis)
Avocado oil has become more popular for a variety of uses, including cooking, as researchers have learned about its health benefits. As a CBD carrier oil, it’s used most often in topical products, but you can find it in products meant to be ingested, as well.
- Quickly and easily absorbed by your skin and digestive tract
- Nutty flavor may be more pleasant than some alternatives
- Especially good for topical uses
- Rich in antioxidants
- High in vitamins A, B, D, and E
- Much thicker than most carrier oils, which may be unpleasant
- Significantly more expensive than many carrier oils
- Higher allergy risk than many carrier oils
Additional Health Claims
Most of the research into avocado oil has only been performed on animals. It’ll need to be studied in humans to determine whether it’s a safe and effective treatment for any condition.
Preliminary evidence suggests it may:
- Lower bad cholesterol and raise good cholesterol, which decreases your risk of heart disease
- Improve glucose tolerance and reduce insulin resistance, providing protection from diabetes
- Improve metabolic markers
Avocado oil is less likely than many oils to clog your pores, so it’s popular for topical use. Its slow drying time may help it last longer than some topical preparations, as well.
Avocado allergies are possible. If you experience itching in your mouth after ingesting avocados or avocado oil, don’t ingest any more and talk to your doctor about it.
Some allergies tend to occur together. People with avocado allergies may also be sensitive to:
- Other fruits and vegetables
This is called oral allergy syndrome. If you have an allergic reaction to any of these things, you should be tested for a reaction to the others, as well.
Extreme allergy symptoms, such as difficulty breathing or anaphylaxis, are uncommon (but possible) with avocados because digestive enzymes tend to break down the allergen before it’s absorbed into your body. Get emergency medical attention if you experience these symptoms.
A Word From Verywell
It’s hard to say which CBD carrier oil is the best—it depends on multiple factors, including the type and uses of the CBD product, whether you have allergies or certain conditions, and your personal preferences.
If you try one you don’t like, you can always try a different one. The most important thing is that you’re making informed choices about what you put in and on your body.
Your doctor is an excellent resource for helping with these decisions, and it never hurts to run it by your pharmacist to make sure the product you’re considering won’t interfere with any of your medications.