Addiction Drug Use Marijuana What Is Cannabidiol (CBD)? By Elizabeth Hartney, BSc, MSc, MA, PhD Elizabeth Hartney, BSc, MSc, MA, PhD Elizabeth Hartney, BSc, MSc, MA, PhD is a psychologist, professor, and Director of the Centre for Health Leadership and Research at Royal Roads University, Canada. Learn about our editorial process Updated on October 09, 2021 Medically reviewed Verywell Mind articles are reviewed by board-certified physicians and mental healthcare professionals. Medical Reviewers confirm the content is thorough and accurate, reflecting the latest evidence-based research. Content is reviewed before publication and upon substantial updates. Learn more. by Steven Gans, MD Medically reviewed by Steven Gans, MD Steven Gans, MD is board-certified in psychiatry and is an active supervisor, teacher, and mentor at Massachusetts General Hospital. Learn about our Medical Review Board Fact checked Verywell Mind content is rigorously reviewed by a team of qualified and experienced fact checkers. Fact checkers review articles for factual accuracy, relevance, and timeliness. We rely on the most current and reputable sources, which are cited in the text and listed at the bottom of each article. Content is fact checked after it has been edited and before publication. Learn more. by Aaron Johnson Fact checked by Aaron Johnson Aaron Johnson is a fact checker and expert on qualitative research design and methodology. Learn about our editorial process Print PeopleImages / Getty Images Table of Contents View All Table of Contents What Is Cannabidiol (CBD)? Types Uses Impact Tips When Taking Cannabidiol Potential Pitfalls What Is Cannabidiol (CBD)? Cannabidiol, or CBD, is an active ingredient in the drug cannabis, also known as marijuana. CBD is the second-most prevalent compound of marijuana, after delta-9-tetrahydrocannabinol, or THC. Marijuana contains over 400 different active substances, and THC and CBD are just two of its 60 different cannabinoid molecules. Cannabidiol can be derived from either the hemp plant or the cannabis plant. It contains THC when derived from marijuana plants, while hemp-derived cannabidiol contains only trace amounts of the psychoactive compound. CBD vs. THC: What's the Difference? Types of Cannabidiol Cannabidiol is available in a number of different forms and can be found in a wide variety of products. The three main types of cannabidiol that are available are: Full-spectrum: This means the product contains other compounds that are found in the cannabis plant, including varying amounts of THC.Broad-spectrum: This type contains other compounds found in cannabis, but does not contain THC.Isolate: This type contains only cannabidiol and not other cannabis compounds. Products that may contain cannabidiol include oils, sprays, capsules, lotions, candies, and beverages. It can be administered in oral, topical, edible, or inhaled forms. Some research suggests that taking full-spectrum cannabidiol products may be beneficial thanks to something known as the entourage effect. Essentially, taking CBD and THC together maximizes the therapeutic benefits. Uses Cannabidiol may have a number of uses. Some evidence suggests that it might have therapeutic applications in the treatment of conditions including: Acne Anxiety Cancer treatment-related side effects such as nausea and vomiting Depression Epilepsy High blood pressure Pain Parkinson's disease Post-traumatic stress disorder (PTSD) Sleep problems It is important to note that while cannabidiol shows promise in the treatment of some symptoms and conditions, further research is needed. Additional studies may explore variations in dosages and administration as well as how treatment with cannabidiol compares to other medications and treatment options. Impact of Cannabidiol There is increasing evidence that CBD may have potential therapeutic benefits, including anticonvulsive, sedative, hypnotic, antipsychotic, and neuroprotective properties. It also has an anti-inflammatory effect, which in animal studies has been found to be more potent than that of aspirin (acetylsalicylic acid). Because CBD produces its biological effects without acting significantly on the brain's cannabinoid receptors, it does not cause the unwanted psychotropic effects that are characteristic of other marijuana derivatives. This gives it a potentially high potential to be used in the development of various forms of medical marijuana. A study comparing THC with CBD showed that some of the unpleasant aspects of the marijuana high, such as anxiety and paranoia, appear to be caused by THC, and alleviated by CBD. Although the subject is complex, studies have shown some neuroprotective effects of CBD. Research comparing the brains of chronic marijuana smokers and the amount of THC and CBD on hair samples indicated that, while THC appears to have a neurotoxic effect—diminishing grey matter in areas of the brain—CBD appears to have a protective effect on the same areas of the brain. Another study looking at the effects of various drugs on dementia showed that CBD may have positive effects on some of the behavioral manifestations of the disease. There is also some research to suggest that CBD may reduce symptoms of psychosis in people with Parkinson's disease. 5 Mental Health Uses for CBD Tips When Taking Cannabidiol Before you decide to try cannabidiol, it is important to consider what you are trying to achieve. If your goal is to relieve symptoms of a condition such as depression or anxiety, ingested or inhaled products are more likely to have therapeutic effects than topical applications. Inhaled cannabidiol begins working quite quickly, while edible or other ingested products may take longer. If you are interested in a localized application, such as to relieve skin problems or muscle inflammation, a topical product such as a cream, ointment, lotion, or salve might be preferable. It is also important to consider the quality of the product itself. One 2017 study published in the Journal of the American Medical Association found that less than a third (31%) of cannabidiol products sold on the internet were labeled correctly. Many contained less CBD than advertised or also had significant amounts of THC. Is CBD Addictive? Potential Pitfalls While research suggests that cannabidiol is generally well tolerated, you may experience some side effects while taking CBD products. Some of these side effects can include: Appetite changesAnxietyDiarrheaDrowsinessDry mouthMood changesNauseaVomiting If you are considering taking CBD, always be sure to talk to your doctor or healthcare provider. Some CBD products may interact with other medications or supplements, so be sure to share any other substances you might be taking with your doctor. Despite the current view that CBD appears to be both a positive agent in and of itself and a potential modifier of some of the negative aspects of THC, reports of how the constituents of cannabis have changed over the first decade of the 21st century are concerning. Typical reports of the amount of THC and CDB in cannabis have been around 4% of each substance. In contrast, "high potency" strains of marijuana that have been developed more recently have been reported to contain 16% to 22% THC and less than 0.1% CBD. This might explain the increase in cannabis-related cases of psychosis. What Dosage of CBD Should You Take? 15 Sources Verywell Mind uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Ujváry I, Hanuš L. Human metabolites of cannabidiol: A review on their formation, biological activity, and relevance in therapy. Cannabis and Cannabinoid Research. 2016;1(1). doi:10.1089/can.2015.0012 Cather JC, Cather JC. Cannabidiol primer for healthcare professionals. Baylor University Medical Center Proceedings. 2020;33(3). doi:10.1080/08998280.2020.1775437 Sarris J, Sinclair J, Karamacoska D, Davidson M, Firth J. Medicinal cannabis for psychiatric disorders: a clinically-focused systematic review. BMC Psychiatry. 2020;20(1). doi:10.1186/s12888-019-2409-8 Stasiłowicz A, Tomala A, Podolak I, Cielecka-Piontek J. Cannabis sativa l. as a natural drug meeting the criteria of a multitarget approach to treatment. International Journal of Molecular Sciences. 2021;22(2). doi:10.3390/ijms22020778 Blessing EM, Steenkamp MM, Manzanares J, Marmar CR. Cannabidiol as a potential treatment for anxiety disorders. Neurotherapeutics. 2015;12(4):825‐836. doi:10.1007/s13311-015-0387-1 Devinsky O, Cross JH, Laux L, et al. Trial of cannabidiol for drug-resistant seizures in the Dravet Syndrome. N Engl J Med. 2017;376(21):2011‐2020. doi:10.1056/NEJMoa1611618 Larsen C, Shahinas J. Dosage, efficacy and safety of cannabidiol administration in adults: a systematic review of human trials. J Clin Med Res. 2020;12(3):129-141. doi:10.14740/jocmr4090 Demirakca T, Sartorius A, Ende G, et al. Diminished gray matter in the hippocampus of cannabis users: possible protective effects of cannabidiol. Drug Alcohol Depend. 2011;114(2-3):242-5. doi:10.1016/j.drugalcdep.2010.09.020 Atalay S, Jarocka-Karpowicz I, Skrzydlewska E. 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Clinical Journal of Oncology Nursing. 2019;23(2). doi:10.1188/19.cjon.131-134 Lachenmeier DW, Habel S, Fischer B, et al. Are side effects of cannabidiol (CBD) products caused by tetrahydrocannabinol (THC) contamination? F1000Research. 2020;8. doi:10.12688/f1000research.19931.3 By Elizabeth Hartney, BSc, MSc, MA, PhD Elizabeth Hartney, BSc, MSc, MA, PhD is a psychologist, professor, and Director of the Centre for Health Leadership and Research at Royal Roads University, Canada. See Our Editorial Process Meet Our Review Board Share Feedback Was this page helpful? Thanks for your feedback! What is your feedback? Other Helpful Report an Error Submit Get Treatment for Addiction Advertiser Disclosure × The offers that appear in this table are from partnerships from which Verywell Mind receives compensation.