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Statistics about cbd oil being good for you

CBD statistics 2022

22% of people say they don’t trust CBD, but 68% of CBD users find it effective. Get your CBD stats straight before you try this natural remedy.

There’s no getting around it: CBD is officially everywhere . Its popularity has skyrocketed. What started as a niche alternative health treatment has become a nationwide craze. And it doesn’t just show up as oils and tinctures anymore. There is whole array of curious CBD products, including lattes, makeup, bedsheets, bath bombs, and even dog treats.

But is CBD a wonder drug, or just another health fad? There’s no shortage of opinions out there, but we can discern a lot from CBD statistics. We’ve compiled reliable research and conducted a CBD survey to put the prevalence of CBD use and its potential health benefits into perspective.

What is CBD?

When some people hear “CBD,” their minds immediately jump to marijuana. And while there is a connection, it’s not as close as one might think. Since recreational and medical cannabis is available in several states now, it’s important to note the differences. CBD is primarily a hemp derivative, which is like a cousin to marijuana, but not the same plant.

Let’s take a step back. Both hemp and marijuana fall into the cannabis genus. Cannabis plants contain two naturally-occurring compounds: cannabidiol (CBD) and tetrahydrocannabinol (THC). CBD and THC are both cannabinoids but have different effects on the body. Most prominently, THC has psychoactive effects and CBD doesn’t, which is why CBD doesn’t make you feel high.

Marijuana and hemp each contain both compounds but in different ratios. Hemp has much lower levels of THC and larger amounts of CBD, which is why it’s often used for CBD products. Marijuana, on the other hand, has significantly more THC.

CBD uses

People use CBD for almost everything. Name a medical condition and there’s likely someone out there treating it with CBD or other cannabis products. But when someone claims that CBD cured their migraines or skin rash, take it with a grain of salt. Because the CBD industry is so new, there simply hasn’t been enough research to fully understand its effects yet.

While it shows plenty of promise in treating various conditions, “it is not a one-size-fits-all [remedy] to treat specific conditions or symptoms of those conditions for every individual,” says Manisha Singal, MD, the founder of Aethera Beauty . “Research on the benefits and action of CBD in topical formulations as well as ingestible forms is ongoing. That experimentation is in its preliminary stages and there is a long way to go. The medical potential for CBD and other cannabinoids is undeniable, but medical research takes time and careful analysis.”

That said, it has shown efficacy in treating chronic pain and anxiety (two of its most common uses), as well as insomnia and arthritis. And the only FDA-approved medication that contains cannabidiol so far is Epidiolex , which treats childhood seizures associated with Dravet Syndrome or Lennox-Gastaut Syndrome in patients two years of age and older.

How common is CBD use?

  • 33% of American adults have used CBD once or more. (SingleCare, 2020)
  • 64% of Americans are familiar with CBD and/or CBD products. (Gallup, 2019)
  • An estimated 64 million Americans have tried CBD in the last 24 months. (Consumer Reports, 2019)
  • Of those who use CBD, 22% said it helped them supplement or replace prescription or over-the-counter drugs. (Consumer Reports, 2019)

CBD statistics in America

  • Hemp-derived CBD products are legal in all 50 states, as long as they contain no more than 0.3% THC. (Food and Drug Administration, 2020)
  • In overall cannabis sales, Colorado tops the list, having sold over $1 billion since 2014. (CNN, 2019)
  • The top states for CBD sales in 2019 are California ($730 million), Florida ($291 million), and New York ($215 million). (Statista, 2019)
  • Of the Americans who use CBD, the most common uses are for pain relief (64%), anxiety (49%), and insomnia (42%). (SingleCare, 2020)
  • CBD web searches increased by 125.9% from 2016 to 2017 and 160.4% from 2017 to 2018. ( JAMA Network , 2019)
  • United States hemp farmland increased from 25,713 acres in 2017 to 78,176 acres in 2018. (Food Business News, 2019)

CBD statistics by age

CBD user demographics skew young. Of all age groups, Americans age 18-29 are most likely to use CBD consistently, and its popularity decreases with age. (Gallup, 2019):

  • 20% of people ages 18-29 use CBD
  • 16% of people ages 30-49 use CBD
  • 11% of people ages 50-64 use CBD
  • 8% of people age 65 and older use CBD

And the numbers nearly double for adults who have tried it once or more. According to a 2019 Consumer Reports CBD survey:

  • 40% of people ages 18-29 have tried CBD
  • 32% of people ages 30-44 have tried CBD
  • 23% of people ages 45-59 have tried CBD
  • 15% of people 60 and older have tried CBD

CBD statistics by method

According to our SingleCare survey, nearly half of CBD users prefer oils/tinctures, lotions/balms, and gummies. But there’s a growing market for CBD edibles.

  • 18% are interested in capsules/tablets
  • 18% are interested in topical sprays
  • 17% are interested in CBD-infused food, such as chocolate
  • 13% are interested in vaping products
  • 12% are interested in soap
  • 11% are interested in non-alcoholic, CBD-infused drinks
  • 9% are interested in CBD bath bombs and salts
  • 8% are interested in skincare products
  • 8% are interested in patches
  • 1% are interested in other CBD products

When it comes to where CBD users get their products, a 2019 Consumer Reports study says:

  • 40% purchase CBD from a dispensary
  • 34% purchase CBD from a retail store
  • 27% purchase CBD from an online retailer
  • 12% purchase CBD from another source

CBD and overall health

CBD enthusiasts will tell you that it changed their lives, citing all sorts of positive effects. Skeptics will tell you that it’s all hype and has no actual benefits. The truth falls somewhere in between. Our survey found that 32% of people who’ve used CBD did not find it effective. While there hasn’t been extensive research on its effects, it shows promise as an anti-inflammatory , anti-anxiety treatment, as well as a sleep aid . And this can give us some insight into CBD’s appeal as a new addition to holistic wellness routines.

People tout CBD as a miracle treatment for heart disease, cancer, autoimmune diseases, Alzheimer’s, acne, and much more. Researchers haven’t found substantial evidence that it can effectively treat any of these conditions, but we also know that inflammation and stress can be contributing factors to these conditions. So, there may be some truth to the claims that CBD is beneficial to everyday health. Whether it’s in a morning smoothie, part of a skincare routine, or something else entirely, regular CBD use can potentially be beneficial for some people, although it comes with risks too.

Recreational vs. medical cannabis use

Recreational cannabis use isn’t quite the same as medical use. CBD oil and other products intended for medical use typically come in smaller doses and aren’t full-spectrum CBD (or “whole plant” CBD), which contains THC as well.

“CBD can have varying strengths depending on if it is used in isolation or if used in conjunction with THC for entourage effects,” says Dr. Singal. And some people want these compound effects. However, there are a ton of CBD producers and retailers out there, and not all of them are reliable. Although 47% of the Americans that we surveyed think the government regulates CBD, it does not.

A recent study by Penn Medicine revealed that almost 70% of cannabidiol products sold online are mislabeled. So, products from online retailers that haven’t been properly vetted could contain higher levels of THC or other compounds. Our survey found that 22% of people won’t try CBD because they don’t trust the product or manufacturer.

CBD side effects

Like other medications, CBD can have side effects, too. In one study , one-third of CBD users reported a non-serious side effect, including dry mouth, euphoria, hunger, irritated eyes, and/or fatigue. And according to Michael Hall, MD, the founder of the Hall Longevity Clinic , the spectrum of side effects is even broader.

“CBD contains multiple oil-based terpenes, which can excite the immune system,” says Dr. Hall. “The most common side effects associated with CBD-based products include sleepiness, sedation, and lethargy; elevated liver enzymes; decreased appetite; diarrhea; rash; fatigue, malaise, and weakness; insomnia, and possible interaction with some prescription medications.”

Typically, these effects aren’t dire, but they can be inconvenient and disruptive to a person’s everyday routine.

As far as drug interactions go, there hasn’t been a ton of research and testing, so it’s hard to say. CBD can potentially interfere with tacrolimus , an immunosuppressive medication. Because there are a lot of unknowns, anyone looking to supplement their current medications with CBD should consult a healthcare provider first.

The cost of CBD

America’s CBD market has a near-vertical trajectory. With the legalization of recreational and medical marijuana in numerous states, an increasing number of people are looking into the benefits of cannabis, and CBD sales reflect that interest.

  • The United States CBD market value was just over $4 billion in 2019 and may top $25 billion by 2025. (Brightfield Group, 2019)
  • The cannabis- and hemp-derived CBD market may see a compound annual growth rate (CAGR) of 49% by 2024. (BDSA, 2019)
  • 44% of regular CBD users spend $20-$80 per month on CBD products. 13% spend more than $160 per month. (Brightfield Group, 2019)

CBD law and restrictions

Here’s the big question: is CBD legal or not? The laws around cannabis are frequently changing and vary from state to state. CBD derived from hemp is legal, as long as it meets certain requirements. The Agriculture Improvement Act of 2018 (AKA the 2018 Farm Bill) allowed for the production and marketing of hemp-derived CBD products without federal regulation as long as they contain no more than 0.3% THC. But these products should not be labeled or marketed as medications. The FDA has only approved one CBD-based drug (Epidiolex), so the sale of other CBD products as drugs for the treatment of specific medical conditions is not yet legal.

Additionally, the FDA has not approved products that contain cannabis or cannabis-derived compounds for medical use. In fact, at the federal level, all marijuana is illegal (medical or otherwise). It’s still classified as a Schedule I substance (along with heroin and LSD) by the DEA under the Controlled Substances Act . However, 33 states have legalized it for medical purposes, and 11 of those have approved recreational use for adults 21 and older. Technically, federal law supersedes state law, but the federal government has not chosen to prosecute businesses and/or individuals selling or using cannabis in states where it’s been legalized.

CBD questions and answers

How many people know what CBD is?

In a recent Gallup poll, 64% of U.S. adults said that they were familiar with CBD and/or CBD products. In a 2020 SingleCare survey, we found that one-third of Americans have used CBD.

Why do people use CBD?

People claim that CBD can treat everything from acne to cancer. But the most common uses are for pain, inflammation, anxiety, and insomnia.

What age group uses CBD the most?

CBD use is most common in populations ages 18-34, according to a recent SingleCare survey.

How much money is spent on CBD?

The CBD market exceeded $4 billion in 2019, according to a study by the Brightfield Group, and they expect the industry to top $25 billion by 2025.

How many people have died from ingesting CBD oil?

CBD oil consumption has not been directly linked to any deaths. One of the most popular CBD products is vape cartridges, however, and the FDA has linked vaping to certain lung injuries and death .

CBD Oil: 9 Science-Backed Benefits

Dr. Bindiya Gandhi is an integrative medicine physician with expertise in functional and holistic medicine based in Atlanta, Georgia.

Commissions we earn from partner links on this page do not affect our opinions or evaluations. Our editorial content is based on thorough research and guidance from the Forbes Health Advisory Board.

Cannabidiol, or CBD, is a chemical compound found in the cannabis sativa plant. When applied topically or consumed through smoke inhalation or edible consumption, CBD interacts with neuroreceptors in your endocannabinoid system, which sends signals between your cells to help regulate your movement, mood, homeostasis and immune system.

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CBD is often extracted from the cannabis sativa plant in oil form and mixed with an inert carrier oil like hemp seed oil for consumption. In fact, of the 60% of U.S. adults who report having used CBD before, 55% of them use CBD oils and tinctures specifically, according to a recent Forbes Health survey of 2,000 U.S. adults conducted by OnePoll.

CBD research is growing, too. Here are nine ways studies suggest CBD oil could benefit your health.

1. Offset Anxiety and Depression

CBD’s ability to calm is perhaps its most popular effect and the reason its use is so widespread. A 2017 study in the Brazilian Journal of Psychiatry tested the anxiety levels of 57 men in a simulated public speaking test. Some received a placebo while others received either 150 milligrams, 300 milligrams or 600 milligrams of CBD before their speeches. Those who received 300 milligrams of CBD experienced significantly reduced anxiety during the test compared to those who received the placebo. Interestingly, participants who received either 150 or 600 milligrams of CBD experienced more anxiety during the test than the 300 milligrams group.

Meanwhile, at least one study in mice revealed CBD had effects similar to the antidepressant imipramine. Human trials are needed, though, to confirm whether CBD can induce this same antidepressant reaction in our bodies.

2. Treat Select Epilepsy Syndromes

In some instances, CBD can be used to treat epileptic seizures.

In 2018, the Food and Drug Administration (FDA) approved the use of CBD under the brand name Epidiolex to treat seizures resulting from Lennox-Gastaut syndrome and Dravet syndrome—two rare forms of epilepsy—in patients at least 2 years old.

Three well-vetted studies provide the basis of support for the FDA’s decision. In these trials, 516 patients with Lennox-Gastaut syndrome or Dravet syndrome received either Epidiolex or a placebo. Epidiolex, when taken along with other prescribed medications, decreased the frequency of participants’ seizures compared to the placebo.

3. Reduce PTSD Symptoms

In a small 2018 study in the Journal of Alternative and Complementary Medicine, 11 people with post-traumatic stress disorder (PTSD) received CBD along with routine psychiatric care for eight weeks in an outpatient psychiatric clinic. Ten of the 11 experienced a decrease in their PTSD symptoms. CBD was generally well tolerated, the researchers write.

Margaret Rajnic, a doctor of nursing practice experienced in medical cannabis and CBD, emphasizes the importance of using therapy in tandem with any type of cannabis or CBD for PTSD. “There is an amount of therapy that is needed for PTSD,” she says. “But CBD will give you that little bit of decreased anxiety.”

Four other human trials from 2012 to 2016 suggest CBD reduces PTSD symptoms, although some include THC, or tetrahydrocannabinol, the main mind-altering element in cannabis. When THC and CBD work together, they create what’s called an “entourage effect,” complementing each other’s benefits and potency. For example, taking the same dose of THC and CBD together tempers the “high” from THC, while just a little THC paired with more CBD enhances the effects of the CBD.

4. Treat Opioid Addiction

Some studies—both preclinical animal and human clinical trials—suggest CBD could be used to help treat people who are dependent on opioids.

In one such study, researchers administered CBD to people with heroin use disorder. Over the course of a week, CBD significantly reduced heroin users’ cue-induced cravings, withdrawal anxiety, resting heart rate and salivary cortisol levels. No serious adverse effects were found.

Other studies find CBD helpful in reducing various psychiatric and medical symptoms like anxiety, insomnia and pain in patients with substance use disorders, indicating that CBD may be an effective treatment for opioid addiction. However, further studies are necessary.

5. Alleviate ALS Symptoms

Amyotrophic lateral sclerosis (ALS) is a disease that causes nerve cells in the brain and spinal cord to deteriorate, resulting in loss of muscle control that worsens over time. It’s not yet understood exactly why ALS occurs, although it can be hereditary in some cases. There’s no known cure, and there are only two FDA-approved medications to help treat ALS symptoms.

Research suggests people with ALS can benefit from the entourage effect created by the combination of THC and CBD, similar to people with PTSD. In a 2019 study, patients received a combination of THC and CBD in varying doses depending on their needs and preferences. Those with mild, moderate or severe spasticity (muscle tightness and stiffness) due to ALS reported high levels of satisfaction with the treatment, and those with moderate to severe spasticity reported higher satisfaction rates than those with mild spasticity.

6. Relieve Unmanageable Pain

In 2005, Canada approved the use of Sativex, an oromucosal (absorbed in the lining of the mouth) spray with equal proportions of THC and CBD, for the treatment of multiple sclerosis-related central neuropathic pain. In 2007, Canada approved the medicine’s use again for cancer pain that proved unresponsive to other medications.

Meanwhile, continued studies in the U.S. indicate CBD is effective in treating chronic, non-cancer pain. In one 2020 study, researchers administered CBD topically to a group of patients with symptomatic peripheral neuropathy (a result of brain nerve and spinal cord nerve damage) while another group with the same condition received a placebo. Results showed a significant reduction in intense, sharp pains and cold, itchy sensations in those who used the topical CBD compared to those who used the placebo. No participants reported adverse side effects.

When introduced topically, CBD oil doesn’t affect the systemic issue as it might if it were introduced directly into the bloodstream. Instead, topical CBD is more localized and treats pain in a certain area. Since it’s more direct, it may have a more pronounced effect.

7. Ease Diabetic Complications

For starters, tests on human cells found that CBD helps reduce the effects of high glucose levels on other cells in the body, which typically precedes the development of diabetes and various complications. Researchers concluded that with further studies, CBD could have significant benefits when used in patients with diabetes, diabetic complications and plaque buildup in artery walls.

In another small study, 13 patients with type 2 diabetes who weren’t on insulin treatment were given both CBD and a placebo (in lieu of insulin). Researchers found CBD decreased their levels of resistin (which causes resistance to insulin, the protein that regulates sugar levels) and increased their levels of glucose-dependent insulinotropic peptide (a hormone that ensures a sufficient release of insulin from digested food) compared to their baselines before they started the test. These results suggest CBD could be a natural treatment for diabetes by helping the body regulate insulin-related hormone levels.

8. Protect Against Neurological Disease

Preclinical and clinical studies show that CBD has antioxidant and anti-inflammatory properties. Researchers deduce these characteristics can provide significant neuroprotection, or protection against numerous pathological disorders.

Several preclinical studies suggest CBD can produce beneficial effects against Parkinson’s disease, Alzheimer’s disease and multiple sclerosis. Huntington’s disease and cerebral ischemia were also tested, although significant positive results were not recorded. Further clinical studies are needed to confirm CBD’s benefits when used as a treatment for these disorders.

9. Inhibit Arthritis Symptoms

Arthritis involves the deterioration of the tissues in and around your joints. There are several types of arthritis, and symptoms include pain, stiffness and loss of motion. Arthritis treatment usually targets pain relief and improved joint function.

A 2006 study found that Sativex—a CBD-based botanical drug approved in the United Kingdom in 2010—promoted statistically significant improvements in quality of sleep, pain during movement and pain at rest in patients with rheumatoid arthritis when compared to a placebo. It was the first controlled trial of Sativex as a treatment for rheumatoid arthritis, involving 58 patients. CBD was found to have a pain-relieving effect, as well as an ability to suppress disease activity.

In 2018, in a study of more localized treatment, researchers administered a synthetic CBD gel in either 250-milligram or 500-milligram doses daily or a placebo to patients with knee pain due to osteoarthritis. Patients also stopped taking any other anti-inflammatory medications or painkillers, with the exception of acetaminophen, before and during the study period.

The results were interesting, although not entirely conclusive. On one hand, those treated with CBD did not experience much change in pain when compared with placebo patients. On the other hand, there were statistically significant differences between the group receiving the 250-milligram dose and the placebo group when measuring the average weekly improvement of their worst pain levels and their WOMAC (Western Ontario and McMaster Universities Arthritis Index) physical function rating. Additionally, men seemed to benefit from CBD more significantly than women in this test.

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What Are the Benefits of CBD?

More than 60 percent of CBD users were taking it for anxiety, according to a survey of 5,000 people. Does it help?

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By Dawn MacKeen

The CBD industry is flourishing, conservatively projected to hit $16 billion in the United States by 2025. Already, the plant extract is being added to cheeseburgers, toothpicks and breath sprays. More than 60 percent of CBD users have taken it for anxiety, according to a survey of 5,000 people, conducted by the Brightfield Group, a cannabis market research firm. Chronic pain, insomnia and depression follow behind. Kim Kardashian West, for example, turned to the product when “freaking out” over the birth of her fourth baby. The professional golfer Bubba Watson drifts off to sleep with it. And Martha Stewart’s French bulldog partakes, too.

What is CBD?

Cannabidiol, or CBD, is the lesser-known child of the cannabis sativa plant; its more famous sibling, tetrahydrocannabinol, or THC, is the active ingredient in pot that catapults users’ “high.” With roots in Central Asia, the plant is believed to have been first used medicinally — or for rituals — around 750 B.C., though there are other estimates too.

Cannabidiol and THC are just two of the plant’s more than 100 cannabinoids. THC is psychoactive, and CBD may or may not be, which is a matter of debate. THC can increase anxiety; it is not clear what effect CBD is having, if any, in reducing it. THC can lead to addiction and cravings; CBD is being studied to help those in recovery.

Cannabis containing 0.3 percent or less of THC is hemp. Although last year’s Farm Bill legalized hemp under federal law, it also preserved the Food and Drug Administration’s oversight of products derived from cannabis.

What are the claims?

CBD is advertised as providing relief for anxiety, depression and post-traumatic stress disorder. It is also marketed to promote sleep. Part of CBD’s popularity is that it purports to be “nonpsychoactive,” and that consumers can reap health benefits from the plant without the high (or the midnight pizza munchies).

Just as hemp seedlings are sprouting up across the United States, so is the marketing. From oils and nasal sprays to lollipops and suppositories, it seems no place is too sacred for CBD. “It’s the monster that has taken over the room,” Dr. Brad Ingram, an associate professor of pediatrics at the University of Mississippi Medical Center, said about all the wild uses for CBD now. He is leading a clinical trial into administering CBD to children and teenagers with drug-resistant epilepsy.

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Understand Post-Traumatic Stress Disorder

The invasive symptoms of PTSD can affect combat veterans and civilians alike. Early intervention is critical for managing the condition.

  • Removing the Stigma: Misconceptions about how PTSD develops and its symptoms, can prevent people from seeking treatment.
  • Psychedelic Drugs: As studies continue to point to the therapeutic value of substances like MDMA, veterans are becoming unlikely advocates for their decriminalization.
  • SeekingPeace: Mission Within is a Mexican retreat that uses hallucinogens to treat PTSD. Some female U.S. veterans and veteran spouses have turned to it to heal from trauma.
  • Virtual Reality: A treatment using new technology to immerse patients in a simulation of a memory could helpthemovercome trauma.

Does CBD work?

“It’s promising in a lot of different therapeutic avenues because it’s relatively safe,” said James MacKillop, co-director of McMaster University’s Michael G. DeGroote Center for Medicinal Cannabis Research in Hamilton, Ontario.

Last year, the F.D.A. approved Epidiolex, a purified CBD extract, to treat rare seizure disorders in patients 2 years or older after three randomized, double-blind and placebo-controlled clinical trials with 516 patients that showed the drug, taken along with other medications, helped to reduce seizures. These types of studies are the gold standard in medicine, in which participants are divided by chance, and neither the subject nor the investigator knows which group is taking the placebo or the medication.

While there is hope for treating other conditions with the plant extract, Epidiolex remains the only CBD-derived drug approved by the F.D.A. Most of the research on cannabidiol has been in animals, and its current popularity has outpaced science. “We don’t have the 101 course on CBD quite figured out yet,” said Ryan Vandrey, an associate professor of psychiatry and behavioral sciences at Johns Hopkins University School of Medicine.

Does CBD help anxiety and PTSD?

For students with generalized social anxiety, a four-minute talk, with minimal time to prepare, can be debilitating. Yet a small experiment in the journal Neuropsychopharmacology found that CBD seemed to reduce nervousness and cognitive impairment in patients with social anxiety in a simulated public speaking task.

However, a double-blind study found healthy volunteers administered CBD had little to no change in their emotional reaction to unpleasant images or words, compared to the placebo group. “If it’s a calming drug, it should change their responses to the stimuli,” said Harriet de Wit, co-author of the study and a professor in the University of Chicago’s department of psychiatry and behavioral neuroscience. “But it didn’t.”

Many soldiers return home haunted by war and PTSD and often avoid certain activities, places or people associated with their traumatic events. The Department of Veterans Affairs is funding its first study on CBD, pairing it with psychotherapy.

“Our top therapies attempt to break the association between reminders of the trauma and the fear response,” said Mallory Loflin, an assistant adjunct professor at the University of California, San Diego and the study’s principal investigator. “We think that CBD, at least in animal models, can help that process happen a lot faster.” While large clinical trials are underway, psychologists say there isn’t compelling evidence yet as to whether this is a viable treatment.

Does CBD help sleep and depression?

Up in the wee hours of the night, stuck watching videos of puppies? CBD may be promising as a sleep aid; one of the side effects of the Epidiolex trials for epilepsy was drowsiness, according to Mr. MacKillop, a co-author of a review on cannabinoids and sleep. “If you are looking for new treatments for sleep, that may be a clue,” he said.

But he cautions that the side effects could have been because of an interaction with other medications the children were taking to control the seizures. So far, there hasn’t been a randomized, placebo-controlled, double-blind trial (the gold standard) on sleep disorders and CBD.

A recent chart review of 72 psychiatric patients treated with CBD found that anxiety improved, but not sleep. “Over all, we did not find that it panned out as a useful treatment for sleep,” said Dr. Scott Shannon, assistant clinical professor of psychiatry at the University of Colorado, Denver and the lead author of the review in The Permanente Journal.

Sleep can be disrupted for many reasons, including depression. Rodents seemed to adapt better to stressful conditions and exhibited less depressive-like behavior after taking CBD, according to a review in Journal of Chemical Neuroanatomy. “Surprisingly, CBD seems to act faster than conventional antidepressants,” wrote one of the authors of a new review, Sâmia Joca, a fellow at the Aarhus Institute of Advanced Studies in Denmark and an associate professor at the University of São Paulo in Brazil, in an email interview. Of course, it’s difficult to detect depression in animals, but the studies that Ms. Joca and her colleagues reviewed suggested that in models of chronic stress exposure, the mice and rats treated with CBD were more resilient.

But without clinical trials in humans, psychologists say CBD’s effect on depression is still a hypothesis, and not an evidence-based treatment.

Is CBD harmful?

“If you take pure CBD, it’s pretty safe,” said Marcel Bonn-Miller, an adjunct assistant professor at the University of Pennsylvania’s Perelman School of Medicine. Side effects in the Epidiolex trial included diarrhea, sleepiness, fatigue, weakness, rash, decreased appetite and elevated liver enzymes. Also, the safe amount to consume in a day, or at all during pregnancy, is still not known.

Recently, the F.D.A. sent a warning letter to Curaleaf Inc. about its “unsubstantiated claims” that the plant extract treats a variety of conditions from pet anxiety and depression to cancer and opioid withdrawal. (In a statement, the company said that some of the products in question had been discontinued and that it was working with the F.D.A.)

Dr. Smita Das, chair of the American Psychiatric Association’s Council on Addiction Psychiatry’s cannabis work group, does not recommend CBD for anxiety, PTSD, sleep or depression. With patients turning to these to unproven products, she is worried that they may delay seeking appropriate mental health care: “I’m dually concerned with how exposure to CBD products can lead somebody into continuing to cannabis products.”

Some CBD products may contain unwanted surprises. Forensic toxicologists at Virginia Commonwealth University examined nine e-liquids advertised as being 100 percent natural CBD extracts. They found one with dextromethorphan, or DXM, used in over-the counter cough medications and considered addictive when abused; and four with a synthetic cannabinoid, sometimes called Spice, that can cause anxiety, psychosis, tachycardia and death, according to a study last year in Forensic Science International.

Earlier research found fewer than a third of 84 products studied contained the amount of CBD on their labels. Some users of CBD have also failed drug tests when the product contained more THC than indicated.

This year, 1,090 people have contacted poison control centers about CBD, according to the American Association of Poison Control Centers. Over a third are estimated to have received medical attention, and 46 were admitted into a critical care unit, possibly because of exposure to other products, or drug interactions. In addition, concern over 318 animals poured into the American Society for the Prevention of Cruelty to Animals’ Animal Poison Control Center.

Is CBD a scam or not?

A few drops of CBD oil in a mocha or smoothie are not likely to do anything, researchers contend. Doctors say another force may also be at play in people feeling good: the placebo effect. That’s when someone believes a drug is working and symptoms seem to improve.

“CBD is not a scam,” said Yasmin Hurd, director of the Addiction Institute of Mount Sinai in New York City who led a double-blind study of 42 recovering heroin addicts and found that CBD reduced both cravings and cue-based anxiety, both of which can cycle people back into using. “It has a potential medicinal value, but when we are putting it into mascara and putting it into tampons, for God’s sake, to me, that’s a scam.”