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CBD vs. THC: What’s the Difference?

CBD and THC are both found in cannabis plants, but the way they interact with your body is different.

CBD and THC

As the legal use of hemp and other cannabis products grows, consumers are becoming more curious about their options. This includes cannabidiol (CBD) and tetrahydrocannabinol (THC), two natural compounds found in plants of the Cannabis genus.

Both compounds interact with your body’s endocannabinoid system, but they have very different effects.

Read on to learn more about these compounds. While they may have a lot in common, they have some key differences that determine how they’re used.

What is CBD?

CBD can be extracted from hemp or cannabis. Hemp and cannabis come from the Cannabis sativa plant. Legal hemp must contain 0.3% THCTrusted Source or less. CBD is sold in the form of gels, gummies, oils, supplements, extracts, and more.

CBD does not produce the high sensation associated with cannabis.

What is THC?

THC is the main psychoactive compound in cannabis that produces the high sensation. It can be consumed by smoking cannabis. It’s also available in oils, edibles, tinctures, capsules, and more.

CBD vs. THC: Chemical structure

Both CBD and THC have the same molecular structure: 21 carbon atomsTrusted Source, 30 hydrogen atoms, and 2 oxygen atoms. A slight difference in how the atoms are arranged accounts for the differing effects on your body.

Both CBD and THC are chemically similar to your body’s endocannabinoids. This allows them to interact with your cannabinoid receptors.

The interaction affects the release of neurotransmitters in your brain. Neurotransmitters are chemicals responsible for relaying messages between cells and have roles in pain, immune function, stress, and sleep, to name a few.

CBD vs. THC: Psychoactive components

Despite their similar chemical structures, CBD and THC don’t have the same psychoactive effects. CBD is psychoactive, just not in the same manner as THC. It doesn’t produce the high associated with THC.

THC binds with the cannabinoid 1 (CB1) receptors in the brain. It produces a high or a sense of euphoria. This high may be greater if the THC is inhaled rather than ingested, according to researchTrusted Source.

CBD binds very weakly, if at all, to CB1 receptors. CBD needs THC to bind to the CB1 receptor and, in turn, can help reduce some of the unwanted psychoactive effects of THC, such as euphoria or sedation.

CBD vs. THC: Legality

In the United States, cannabis-related laws are evolving regularly. Technically, CBD is still considered a Schedule I drug under federal law.

Hemp has been removed from the Controlled Substances Act, but the Drug Enforcement Administration (DEA) and Food and Drug Administration (FDA) still classify CBD as a Schedule I drug.

However, 37 states, plus Washington, D.C., have passed cannabis-related laws, making medical cannabis with high levels of THC legal. The cannabis may need to be prescribed by a licensed physician.

In addition, 19 states, two territories, and the District of Columbia have made adult recreational use of cannabis and THC legal.

In states where cannabis is legal for recreational or medical purposes, you should be able to buy CBD.

Before you try to buy products with CBD or THC, it’s important to research your state’s laws.

If you possess cannabis-related products in a state where they’re illegal or don’t have a medical prescription in states where the products are legal for medical treatment, you could face legal penalties.

CBD vs. THC: Medical benefits

CBD and THC have many of the same medical benefits. They can provide relief from several of the same conditions. However, CBD doesn’t cause the euphoric effects that occur with THC. Some people may prefer to use CBD because of the lack of this side effect.

CBD

In June 2018, the FDA approvedTrusted Source Epidiolex, the first prescription medication to contain CBD. It’s used to treat rare, difficult-to-control forms of epilepsy. (Epidiolex is not currently approved for any of the other conditions listed below.)

CBD is used to help with other various conditions, such as:

According to 2020 researchTrusted Source, CBD may help with

  • social anxiety
  • schizophrenia
  • sleep disorders
  • post-traumatic stress disorders

It has yet to be approved by the FDA for these uses. More research is needed to determine whether CBD can effectively treat these conditions and others. Current clinical studies are investigating CBD as a possible treatment for:

  • mood disorders
  • chronic pain
  • inflammatory diseases
  • neurodegenerative diseases like Alzheimer’s and Parkinson’s diseases
  • tumors

THC

Two synthetic formulations of THC are approved by the FDATrusted Source for treating specific conditions.

Nabilone (Cesamet) is FDA approved for treating chemotherapy-induced nausea and vomiting.

Dronabinol (Marinol, Syndros) is FDA approved to treat nausea and vomiting caused by chemotherapy drugs. It is also approved to stimulate appetite in people with AIDS or anorexia.

THC is often used to help with the following:

Recent studiesTrusted Source are looking at the potential of THC to possibly treat the following:

  • obstructive sleep apnea
  • fibromyalgia
  • chronic neuropathic pain

CBD vs. THC: Side effects

CBD is well tolerated, even in large doses. ResearchTrusted Source suggests any side effects that occur with CBD use are likely the result of drug-to-drug interactions between CBD and other medications you may be taking. This may include liver damage.

CBD’s side effects may include:

THC causes temporary side effects, such as:

  • increased heart rate
  • coordination problems
  • dry mouth
  • red eyes
  • slower reaction times
  • memory loss
  • anxiety
  • tiredness
  • confusion
  • distress
  • low blood pressure
  • seizures and seizure-like activity

These side effects are part of the compound’s psychoactive properties.

Neither compound is fatal.

However, high THC use may be connected to long-term negative psychiatric effects. This may be especially true for adolescents who consume large amounts of THC.

Long-term cannabis use can cause amotivational syndrome in which people experience symptoms of depression along with low motivation, according to 2021 researchTrusted Source. The same research notes that cannabis use has also been linked to psychosis, depression, anxiety, schizophrenia, and substance use disorders.

However, there’s currently no conclusive evidence that using cannabis causes psychiatric disorders like schizophrenia.

CBD vs. THC: Drug testing

Cannabinoids like THC and CBD are stored in the body’s fat. They can show up on drug tests for several days or weeks after you use them.

Not every drug test will be able to detect CBD, but CBD-sensitive tests are available. Most standard drug tests will look for chemicals related to THC, so THC or cannabis use might appear on a screening.

Likewise, hemp can produce some THC in addition to CBD, so a test could be positive for THC even if you haven’t used it.

It’s important to note that products that claim to be THC-free may not be free of THC, so if you’re drug tested, you should not use any CBD or THC products.

Why do people talk about THC content in CBD oil if THC and CBD are two different compounds?

CBD and THC are two of the most prominent cannabinoids found in the cannabis plant. Both cannabis and hemp produce CBD and THC.

However, cannabis has a higher concentration of THC. Hemp has a higher concentration of CBD.

The average cannabis strain before 2014 contained about 12 percentTrusted Source THC. Current levels may be closer to 15% to 30%Trusted Source and may also vary by location, according to 2020 research. CBD oil may contain small amounts of THC because it’s present at low levels in the hemp plant. CBD can have no more than 0.3 percent THC to be legal at the federal level.

Takeaway

CBD and THC both have medical benefits. They’re also both considered safe but consider the possibility of side effects and interactions with other drugs you’re taking. Talk with your doctor or a qualified cannabis or CBD clinician before use and if you have any questions.

Want to learn more about CBD?

CBD THC
Is illegal No (See below) Yes (See below)
Produces a high No Yes
Interacts with endocannabinoid system Yes Yes
Has side effects Some Psychoactive side effects.
Shows on drug test Possibly Yes
Relieves pain Yes Yes
Reduces nausea Yes Yes
Eases migraine Yes Yes
Reduces anxiety Yes Yes
Eases depression Yes No
Decreases seizures Yes No
Is anti-inflammatory Yes Yes
Helps with insomnia Yes Yes
Helps with psychosis Yes No
Increases appetite No Yes
Is used for various other conditions Yes Yes

Is CBD Legal? Hemp-derived CBD products (with less than 0.3 percent THC) are legal on the federal level but are still illegal under some state laws. Marijuana-derived CBD products are illegal on the federal level but are legal under some state laws. Check your state’s laws and those of anywhere you travel. Keep in mind that nonprescription CBD products are not FDA-approved and may be inaccurately labeled.

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