Health
Marijuana Dependence Linked to Higher Risk of Death
Hospital and emergency room patients diagnosed with cannabis use disorder — defined as an inability to stop using cannabis even when the drug is causing harm — died at almost three times the rate of individuals without the disorder over the next five years, according to a study published on Thursday, the largest on the subject.
Patients with cannabis use disorder were 10 times as likely to die by suicide as those in the general population. They were also more likely to die from trauma, drug poisonings and lung cancer. Those numbers suggest that cannabis use disorder is about half as dangerous as opioid addiction and slightly less dangerous than alcohol use disorder, the researchers said.
A second report, published on Tuesday, found that more cases of schizophrenia and psychosis in Canada have been linked to cannabis use disorder since the drug was legalized.
“Many people think, ‘Oh, cannabis is not harmful — it’s organic, it’s natural; how great,’” said Dr. Laura Bierut, a psychiatrist at Washington University School of Medicine in St. Louis who is an author of an editorial accompanying the study of death risk. But the marijuana sold today is far more potent, and more harmful, than what baby boomers smoked in the 1960s and 1970s, she said.
“It is a public health threat just like alcohol,” Dr. Bierut said.
Recent research suggests that three in 10 cannabis users will develop cannabis use disorder, defined as being unable to stop using cannabis even though it’s causing serious health and social problems. As with alcohol, many people use marijuana recreationally without adverse effects or addiction.
The researchers took advantage of records in Ontario that capture millions of residents’ encounters with the government health system, which covers 97 percent of the population there.
From the records, the scientists in Thursday’s study identified 106,994 people who were diagnosed with cannabis use disorder during an emergency department visit or hospitalization between 2006 and 2021.
The researchers linked the records with vital statistics records and found that 3.5 percent of them died within five years of treatment for the disorder. In a matched comparison group of people of the same age and sex, the death rate was 0.6 percent.
The authors then made adjustments to account for other risk factors that may have contributed to their deaths, including mental health disorders, other substance use and conditions like heart disease and cancer.
Even when taking deaths by those other causes out of the equation, the researchers concluded that patients with cannabis use disorder were at a 2.8-fold increased risk of death compared with the general population. The risk was greatest in young adults ages 25 to 44.
Dr. Daniel Myran, an assistant professor of family medicine at University of Ottawa and the study’s first author, noted that these are most likely underestimates of cannabis’s toll.
“Our estimate is that for every person treated for C.U.D. there are another three who didn’t seek care,” he said. “So this is not just C.U.D., but bad enough that they sought care for it.”
He also noted that the study could not conclusively determine whether the cannabis itself increased death risk, or whether it was other lifestyle or health factors that happen to be more common among heavy cannabis users.
“Either way, this group is really, really high risk, and could benefit from intervention and monitoring and prevention,” he said.
On Tuesday, the same research group published a study looking at whether Canada’s recent legalization of marijuana affected rates of psychosis and schizophrenia.
Cannabis use has been associated with the development of schizophrenia, a serious mental illness, as well as transient psychotic episodes characterized by a loss of contact with reality. Some research has found no association between cannabis legalization and an increase in these disorders, but many studies are too small to detect changes in the prevalence of psychotic disorders, which are rare.
The new study analyzed cannabis-linked psychosis in Canada during three periods: before the country made cannabis legal (2006 to 2015), amid widening use of medical and nonmedical cannabis (2015-2018) and after the recreational use of cannabis was made legal (2018 to 2022).
The rates of schizophrenia were stable over time. But the percentage of cases attributable to cannabis use disorder increased to 10.3 percent during the legalization period, up from 3.7 percent before legalization, the authors found. The rate of psychosis (without a diagnosis of schizophrenia) nearly doubled after legalization.
Young adults ages 19 to 24 were most vulnerable, said Jodi Gilman, an associate professor of psychiatry at Harvard Medical School who wrote a commentary about the study.
“This is a period of the life span when the brain is still developing and still vulnerable to the effects of cannabis,” Dr. Gilman said. Psychosis and schizophrenia are also known to develop in young adulthood, she added, “so you have a double hit.”
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Eating a diet high in fruits and vegetables was found to have a surprising link to lung cancer among younger non-smokers, early research suggests.
The observational study, led by Jorge Nieva, M.D., of the USC Norris Comprehensive Cancer Center at Keck Medicine, was presented this month at the American Association for Cancer Research (AACR) annual meeting in San Diego. It has not yet been peer-reviewed.
Researchers looked at dietary, smoking and demographic data for 187 patients who were diagnosed with lung cancer at age 50 or younger.
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They found that among non-smokers, there was a link between healthier-than-average diets – rich in fruits, vegetables and whole grains – and the chance of lung cancer development.
Young lung cancer patients ate more servings of dark green vegetables, legumes and whole grains compared to the average U.S. adult, the researchers found.
Eating a diet high in fruits and vegetables was found to have a surprising link to lung cancer among younger non-smokers, early research suggests. (iStock)
The researchers hypothesized that pesticides applied to conventionally grown produce could be a possible factor in the disease association.
“Commercially produced (non-organic) fruits, vegetables and whole grains are more likely to be associated with a higher residue of pesticides than dairy, meat and many processed foods,” according to Nieva. He also noted that agricultural workers exposed to pesticides tend to have higher rates of lung cancer.
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“There is a large subset of lung cancer patients whose disease is not caused by smoking,” Nieva told Fox News Digital.
The disease is becoming more common in non-smokers 50 and younger, especially women – despite the fact that smoking rates have been falling for decades, the researcher noted.
The researchers hypothesized that pesticides applied to conventionally grown produce could be a possible factor in the disease association. (iStock)
“These patients tend to have eaten much healthier diets before their diagnosis than the average American,” he went on. “We need to support research into understanding why Americans – and women in particular – who no longer smoke very much are still having lung cancer,” he said.
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The study did have some limitations, Nieva acknowledged, primarily that it relied on survey data and was limited by the participants’ memories of their food intake.
“Also, the survey participants were self-selected, and this could have biased the findings,” he told Fox News Digital.
“There is a large subset of lung cancer patients whose disease is not caused by smoking.”
The researchers did not test specific foods for pesticides, relying instead on average pesticide levels for certain types of food. Looking ahead, they plan to test patients’ blood and urine samples to directly measure pesticide levels, Nieva said.
Although the study shows only an association and does not prove that pesticides caused lung cancer, Nieva recommends that people wash their produce before eating and choose organic foods whenever possible.
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“This work represents a critical step toward identifying modifiable environmental factors that may contribute to lung cancer in young adults,” said Nieva. “Our hope is that these insights can guide both public health recommendations and future investigation into lung cancer prevention.”
“It is possible that the increased lung cancer risk could be due to pesticide exposure in whole farmed foods, but is by no means certain,” a doctor said. (AP Photo/Charlie Neibergall)
Dr. Marc Siegel, Fox News senior medical analyst, said the study is “interesting,” but that it “raises far more questions than it answers.”
“It is a small study (around 150) and observational, so no proof,” the doctor, who was not involved in the research, told Fox News Digital.
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“It is possible that the increased lung cancer risk could be due to pesticide exposure in whole farmed foods, but it is by no means certain,” Siegel went on. “How much exposure is needed? How much of it gets into food and in which areas? This requires much further study.”
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Kayla Nichols, communications director for Pesticide Action & Agroecology Network, a distributed global network, said the organization agrees with the study’s conclusion that more research should be done on the rise in lung cancer, particularly in individuals eating diets higher in produce and fiber.
“There is a large subset of lung cancer patients whose disease is not caused by smoking,” the researcher told Fox News Digital. (iStock)
“There is a bounty of existing research that already links pesticide exposure to increased risk of multiple types of cancers,” Nichols, who was also not involved in the study, told Fox News Digital. She called for more research on chronic, low-level exposures to pesticides, as well as more effective policies to protect the public from pesticide residues on food.
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The study was supported by the National Institutes of Health and the National Cancer Institute, as well as industry partners including AstraZeneca and Genentech, among others.
Fox News Digital reached out to several pesticide companies and trade groups for comment.
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Colorectal cancer, once considered a disease of older age, is becoming a crisis for younger adults. New research shows one group getting hit the hardest – those without a college degree.
A recent study from the American Cancer Society analyzed data from over 101,000 adults aged 25 to 49 who died from colorectal cancer between 1994 and 2023.
While death rates remained stable for college graduates, they climbed significantly for those without a bachelor’s degree, the findings showed.
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For young adults with a high school education or less, the mortality rate rose from 4.0 to 5.2 per 100,000 people, while the rate for those with at least a bachelor’s degree stayed flat, at approximately 2.7 per 100,000.
This does not mean that a degree offers some kind of biological protection, researchers cautioned.
Colorectal cancer, once considered a disease of older age, is becoming a crisis for younger adults. (iStock)
The difference is likely driven by the conditions in which people live and work, which often correlate with education levels, the researchers noted.
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The study suggests that the higher death rates are likely driven by differences in the prevalence of risk factors, including obesity, physical inactivity, smoking and diet, which are “known to be elevated among children and young adults with lower [socioeconomic status].”
Because the study relied on death certificates, researchers couldn’t say exactly why college graduates had better outcomes.
Because the researchers didn’t have the patients’ actual medical records, they couldn’t see things like frequency of screenings or treatment options, which would impact survival outcomes. (iStock)
Certificates typically list the cause of death, age, race and education level, but they do not include a person’s full medical history.
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Because the researchers didn’t have the patients’ actual medical records, they couldn’t see things like frequency of screenings or treatment options, which would impact survival outcomes.
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Colorectal cancer is now the leading cause of cancer death for men under 50 and the second leading cause for women in the same age group, according to recent statistics.
While colorectal cancer death rates remained stable for college graduates, they climbed significantly for those without a bachelor’s degree, the findings showed. (iStock)
Because the disease is highly treatable when caught early, the U.S. Preventive Services Task Force (USPSTF) lowered the recommended screening age from 50 to 45 in 2021.
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Common signs and symptoms of colorectal cancer can include a change in bowel habits, such as diarrhea, constipation or narrowing of the stool, that lasts for more than a few days, according to the American Cancer Society.
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Other signs that warrant seeing a doctor include blood in the stool or a persistent feeling of needing to go to the bathroom but being unable to go.
The research was published in JAMA Oncology.
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A young woman who started vaping at the age of 15 has been given just 18 months to live — after being diagnosed with lung cancer in her early 20s.
Kayley Boda, 22, of Manchester, in the United Kingdom, was engaging in heavy vaping on a regular basis when she started coughing up a brown substance with “grainy bits” in it in January 2025, news agency SWNS reported.
The retail assistant said doctors turned her away eight times, telling her she had a chest infection — until she began coughing up blood.
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After seven biopsies, Boda was diagnosed with lung cancer. She underwent surgery to remove the lower lobe of her right lung, as well as chemotherapy — and in February 2026, got the all-clear, the same source reported.
Two months later, though, doctors said the cancer had come back in the pleural lining. Now she’s been given 18 months to live.
Kayley Boda, 22, is shown in the hospital. She started coughing up a brown substance with “grainy bits” in January 2025, she said. She had been vaping since the age of 15. (SWNS)
The young woman has now issued a warning to others to be aware of the dangers of vaping.
Boda said she smoked a bit as a young teenager. She took up vaping after that.
Then, “a few months after I switched from reusable vapes to disposable ones, I started coughing up brown, grainy mucus,” as SWNS reported.
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“Doctors turned me away eight times with a chest infection. … Then I started coughing up blood, so they did an X-ray and found a shadow on my lung,” she added.
“They told me they were 99% sure, [since I was] so young, that it wasn’t cancer, so not to worry about it. When I got the results back, and they told me it was lung cancer, it felt so surreal.”
Boda said she was “very naive” before her diagnosis and thought that “something like this would never happen to me.”
She said that she had surgery to remove half of her right lung.
“After the surgery, I started chemo and I had a terrible reaction to it. I couldn’t lift my head up. I was throwing up blood. I was urinating blood. I couldn’t eat. I couldn’t sleep.”
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She said that when she got the “all clear [in Feb. 2026], it felt amazing, but just two months later I was told the cancer had come back, and I have 18 months to live.”
She added, “I’m 22. This isn’t meant to happen to somebody my age.”
“Stay off the vapes because they will catch up with you.”
She blames her cancer on vaping, she said.
“My symptoms started a few months after I started disposable vapes, and there’s no lung cancer in my family,” she said. “I haven’t vaped for three months, I’ve made my partner stop, I’ve made my mom stop, I’m urging all my friends to stop. Stay off the vapes,” she continued, “because they will catch up with you.”
When doctors did an X-ray, they found a shadow on Boda’s right lung. She was later diagnosed with lung cancer and has undergone surgery to remove the lower lobe of her right lung, as well as chemotherapy. (SWNS)
She said she’d been using reusable vapes since the age of 15 and began using disposable vapes a few months before her cancer symptoms started.
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In November 2024, when she developed a rash all over her body, doctors said it could have been due to shingles, chicken pox or scabies, she told SWNS.
‘Nothing worked’
“I got treated for all three, and nothing worked,” Boda said. “It got to the point where I was cutting myself from scratching so hard.”
A few months after that, she began coughing up a dark brown mucus, with “grainy bits, the consistency of sugar, in it,” she said. When the coughing continued, she visited the doctor’s office, but was told it could be scarring from pneumonia or a chest infection, she also said.
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It wasn’t until March 2025 that she began coughing up bright red blood. At that point, doctors gave her a chest X-ray and told her they’d found a shadow on her lower right lung.
Over the next four months, she had seven biopsies as doctors took samples from the “shadow.” In August, when she went to get the results, she was told she had stage one lung cancer.
Boda is shown in the hospital. She was diagnosed with lung cancer and had surgery to remove the lower lobe of her right lung, as well as chemotherapy. (SWNS)
In September 2025, she had surgery to remove the lower lobe of her right lung, and the surrounding lymph nodes. During the surgery, doctors upstaged her cancer from stage one to stage three after finding cancer in six surrounding lymph nodes, she said.
Following the surgery, Boda was unable to breathe properly and had to learn to walk all over again.
“The oncologist said this is so rare.”
After finishing chemotherapy in February 2026, Kayley was given the all clear, leaving her feeling elated.
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However, just a month after that, she began experiencing extreme chest pains and was told by doctors she had a pleural effusion — a build-up of fluid in the lungs. She had the fluid removed, but when doctors tested it, they discovered her cancer had returned to the pleural lining of her lungs, giving her 18 months to live.
“The oncologist said this is so rare, and usually something they see in patients that are 80 years old,” she said, as SWNS reported.
Increasingly, vacation hot spots are enforcing strict bans on the use of e-cigarettes in public venues. (iStock)
Boda claimed that doctors were unable to pin her cancer to a specific cause — but told her that smoking and vaping definitely didn’t help.
Since her diagnosis, she has stopped and is urging others to stop, too.
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She’s hoping to raise the thousands of dollars needed for treatment to try to prolong her life, she said.
Last year, Fox News Digital reported on the case of a Pennsylvania woman, 26, who said she vaped for just one year before her lungs collapsed. She was 22 when she took up the habit, she said in an interview.
“Everybody warned me about it, but I didn’t listen — I wish that I did,” she said.
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Dr. David Campbell, clinical director and program director at Recover Together Bend in Oregon, told Fox News Digital at that time that signs of collapsed lungs include sharp chest or shoulder pain, shortness of breath and difficulty breathing.
Lung issues are just one of the many health issues linked to vaping, he warned. The habit can also increase the risk of heart disease and stroke, as well as exposure to harmful heavy metals.
Melissa Rudy of Fox News Digital contributed reporting.
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