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Older People Seeking Care for Cannabis Use at Greater Risk for Dementia, Study Finds

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Older People Seeking Care for Cannabis Use at Greater Risk for Dementia, Study Finds

Middle-aged and older adults who sought hospital or emergency room care because of cannabis use were almost twice as likely to develop dementia over the next five years, compared with similar people in the general population, a large Canadian study reported on Monday.

When compared with adults who sought care for other reasons, the risk of developing dementia was still 23 percent higher among users of cannabis, the study also found.

The study included the medical records of six million people in Ontario from 2008 to 2021. The authors accounted for health and sociodemographic differences between comparison groups, some of which play a role in cognitive decline.

The data do not reveal how much cannabis the subjects had been using, and the study does not prove that regular or heavy cannabis use plays a causal role in dementia.

But the finding does raise serious concerns that require further exploration, said Dr. Daniel T. Myran, the first author of the study, which was published in JAMA Neurology.

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“Figuring out whether or not cannabis use or heavy regular chronic use causes dementia is a challenging and complicated question that you don’t answer in one study,” said Dr. Myran, an assistant professor of family medicine at University of Ottawa.

“This contributes to the literature and to a sign, or signal, of concern.”

Dr. Myran’s previous research has found that patients with cannabis use disorder died at almost three times the rate of individuals without the disorder over a five-year period. He has also reported that more cases of schizophrenia and psychosis in Canada have been linked to cannabis use disorder since the drug was legalized.

The latest study, focusing on dementia, adds to a growing body of literature on regular or heavy cannabis use and cognition. Researchers have reported impacts on verbal learning, memory and attention, while imaging studies have pointed to changes in the brain related to the use of cannabis and other substances.

Veterans with traumatic brain injuries in addition to cannabis use disorder may be at heightened risk for early-onset dementia, researchers reported last year.

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But many of the studies are relatively small. The new report’s strength was its large sample and the ability to track patients over time who did not have a diagnosis of dementia when they entered the study, said Madeline Meier, an associate professor of psychology at Arizona State University, who was not involved in the study.

“They were able to rule out dementia at the time of the first cannabis visit, and were able to show the temporal order — the cannabis came first, and the dementia came second,” said Dr. Meier.

Her research, which has followed and periodically tested a cohort of over 1,000 individuals over a period of many years, has linked cannabis use and neuropsychological decline.

“I think you want to combat this whole idea that cannabis is harmless and maybe even has some medical benefits,” Dr. Meier said. “This study is showing an association that I think people should take seriously and say, ‘Maybe this is putting me at risk.’”

She noted that the work by Dr. Myran and his colleagues also found that people seeking care for alcohol use were even more likely to receive a dementia diagnosis than were cannabis users.

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“I’m worried about the substance abuse in that Baby Boomer age,” she said.

More and more people, including seniors, are using cannabis. Medical visits related to cannabis increased more than fivefold among adults 45 and older between 2008 and 2021, the new study found. Among adults 65 and over, visits increased almost 27-fold.

The study included more than 6 million people age 45 and over who did not have a diagnosis of dementia at the start of the research. Of them, 16,275 had an acute-care medical encounter because of cannabis.

The patients with cannabis-related visits were compared to the matched general population, and in a separate comparison, to 140,824 matched patients who needed medical care for all other reasons.

Within five years, 5 percent of those with acute care cannabis visits received a dementia diagnosis. The figure for individuals needing care for other reasons was 3.6 percent, and for similar individuals in the general population, 1.3 percent.

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But people who are heavy cannabis users differ from those who are not in a variety of ways, some of which may help explain the increased risk for dementia, Dr. Myran explained.

While some of the factors can be accounted for, he said, “you can’t control for all of them.”

Another unknown is self-medication, he said. Someone who has started experiencing symptoms of cognitive decline may be more likely to turn to cannabis. If so, then “it looks as if the cannabis is causing dementia, but it’s just on the pathway — they were already developing dementia,” Dr. Myran said.

After making adjustments for age, sex, income and other factors, including other health conditions, he and his colleagues determined that patients who sought care for cannabis-related reasons were 1.23 times as likely as those who had gotten any kind of acute care to be diagnosed with dementia, and 1.72 times as likely as those in the healthier general population.

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For Oprah Winfrey, a croissant is now just a croissant — not a struggle

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For Oprah Winfrey, a croissant is now just a croissant — not a struggle

Yes, Oprah Winfrey has discussed her weight loss and weight gain and weight in general before — many, many times before. The difference this time around, she says, is how little food noise there is in her daily life, and how little shame. It’s so quiet, in fact, that she can eat a whole croissant and simply acknowledge she had breakfast.

“Food noise,” for those who don’t experience it, is a virtually nonstop mental conversation about food that, according to Tufts Medicine, rarely shuts up and instead drives a person “to eat when they’re not hungry, obsess over meals and feel shame or guilt about their eating habits.”

“This type of obsessive food-related thinking can override hunger cues and lead to patterns of overeating, undereating or emotional eating — especially for people who are overweight,” Tufts said.

Winfrey told People in an exclusive interview published Tuesday that in the past she would have been thinking, “‘How many calories in that croissant? How long is it going to take me to work it off? If I have the croissant, I won’t be able to have dinner.’ I’d still be thinking about that damn croissant!”

What has changed is her acceptance 2½ years ago that she has a disease, obesity, and that this time around there was something not called “willpower” to help her manage it.

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The talk show host has been using Mounjaro, one of the GLP-1 drugs, since 2023. The weight-loss version of Mounjaro is Zepbound, like Wegovy is the weight-loss version of Ozempic. Trulicity and Victroza are also GLP-1s, and a pill version of Wegovy was just approved by the FDA.

When she started using the injectable, Winfrey told People she welcomed the arrival of a tool to help her get away from the yo-yo path she’d been on for decades. After understanding the science behind it, she said, she was “absolutely done with the shaming from other people and particularly myself” after so many years of weathering public criticism about her weight.

“I have been blamed and shamed,” she said elsewhere in that 2023 interview, “and I blamed and shamed myself.”

Now, on the eve of 2026, Winfrey says her mental shift is complete. “I came to understand that overeating doesn’t cause obesity. Obesity causes overeating,” she told the outlet. “And that’s the most mind-blowing, freeing thing I’ve experienced as an adult.”

She isn’t even sharing her current weight with the public.

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Winfrey did take a break from the medication early in 2024, she said, and started to regain weight despite continuing to work out and eat healthy foods. So for Winfrey the obesity prescription will be renewed for a lifetime. C’est la vie seems to be her attitude.

“I’m not constantly punishing myself,” she said. “I hardly recognize the woman I’ve become. But she’s a happy woman.”

Winfrey has to take a carefully managed magnesium supplement and make sure she drinks enough water, she said. The shots are done weekly, except when she feels like she can go 10 or 12 days. But packing clothes for the Australian leg of her “Enough” book tour was an off-the-rack delight, not a trip down a shame spiral. She’s even totally into regular exercise.

Plus along with the “quiet strength” she has found in the absence of food noise, Winfrey has experienced another cool side effect: She pretty much couldn’t care less about drinking alcohol.

“I was a big fan of tequila. I literally had 17 shots one night,” she told People. “I haven’t had a drink in years. The fact that I no longer even have a desire for it is pretty amazing.”

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So back to that croissant. How did she feel after she scarfed it down?

“I felt nothing,” she said. “The only thing I thought was, ‘I need to clean up these crumbs.’”

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Owners of mobile home park destroyed in the Palisades fire say they’re finally clearing the debris

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Owners of mobile home park destroyed in the Palisades fire say they’re finally clearing the debris

Former residents of the Palisades Bowl Mobile Home Estates, a roughly 170-unit mobile home park completely destroyed in the Palisades fire, received a notice Dec. 23 from park owners saying debris removal would start as early as Jan. 2.

The Bowl is the largest of only a handful of properties in the Palisades still littered with debris nearly a year after the fire. It’s left the Bowl’s former residents, who described the park as a “slice of paradise,” stuck in limbo.

The email notice, which was reviewed by The Times, instructed residents to remove any burnt cars from their lots as quickly as possible, since contractors cannot dispose of vehicles without possessing the title. It followed months of near silence from the owners.

“The day before Christmas Eve … it triggers everybody and throws everybody upside down,” said Jon Brown, who lived in the Bowl for 10 years and now helps lead the fight for the residents’ right to return home. “Am I liable if I can’t get this done right now? Between Christmas and New Year’s? It’s just the most obnoxious, disgusting behavior.”

Brown is not optimistic the owners will follow through. “They’ve said things like this before over the years with a bunch of different things,” he said, “and then they find some reason not to do it.”

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Earlier this year, the Federal Emergency Management Agency denied requests from the city and the Bowl’s owners to include the park in the U.S. Army Corps of Engineers cleanup program, which FEMA said was focused on residential lots, not commercial properties. In a letter, FEMA argued it could not trust the owners of the Bowl to preserve the beachfront property as affordable housing.

A tattered flag waves in the wind at Asilomar View Park overlooking the Pacific Palisades Bowl Mobile Estates.

(Myung J. Chun/Los Angeles Times)

The Bowl, which began as a Methodist camp in the 1890s, was purchased by Edward Biggs, a Northern California real estate mogul, in 2005 and split between his first and second wives after his death in 2021. The family has a history of failing to perform routine maintenance and seeking to redevelop the park into a more lucrative resort community.

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After FEMA’s rejection, the owners failed to meet the City of L.A.’s debris removal deadlines. In October, the city’s Board of Building and Safety Commissioners declared the park a public nuisance alongside seven other properties, giving the city the authority to complete the debris removal itself and charge the owners the bill.

But the city has yet to find funds to front the work, which is expected to cost millions.

On Dec. 10, City Councilmember Traci Park filed a motion that would order the city to come up with a cost estimate for debris removal and identify funding sources within the city. It would also instruct the city attorney’s office to explore using criminal prosecution to address the uncleared properties.

The Department of Building and Safety did not immediately respond to requests for comment.

Despite the recent movement on debris removal, residents of the Palisades Bowl still have a long road ahead.

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Fire debris remains at Pacific Palisades Bowl Mobile Estates on Dec. 31, 2025.

On Wednesday, numerous burnt out vehicles still remained at the Pacific Palisades Bowl Mobile Estates. The owners instructed residents they must get them removed as quickly as possible.

(Myung J. Chun/Los Angeles Times)

In mobile home parks, tenants lease their spaces from the landowners but own the homes placed on the land. Before residents can start rebuilding, the Bowl’s owners need to replace or repair the foundations for the homes; fix any damage to the roads, utilities and retaining walls; and rebuild facilities like the community center and pool.

The owners have not responded to multiple requests for comment, but in February, Colby Biggs, Edward Biggs’ grandson, told CalMatters that “If we have to go invest $100 million to rebuild the park and we’re not able to recoup that in some fashion, then it’s not likely we will rebuild the park.”

Mobile home law experts and many residents doubt that the Biggs family would be able to convert the rent-controlled mobile home park into something else under existing law. The most realistic option, should the Biggs decide against rebuilding, would be to sell the park to another owner — or directly to the residents, a course of action the residents have been actively pursuing.

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The lack of communication and action from the owners has nonetheless left the Bowl’s eclectic former community of artists, teachers, surfers, first responders and retirees in limbo.

Many are running out of insurance money for temporary housing and remain unsure whether they’ll ever be able to move back.

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Video: Drones Detect Virus in Whale Blow in the Arctic

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Video: Drones Detect Virus in Whale Blow in the Arctic

new video loaded: Drones Detect Virus in Whale Blow in the Arctic

Scientists flew drones with petri dishes above several species of whales in northern seas to collect samples of whale blow, which they tested for four different viruses. For the first time in the Arctic, researchers found cetacean morbillivirus, a highly infectious and deadly virus for marine mammals.

By Jamie Leventhal and Alexa Robles-Gil

January 2, 2026

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