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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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Facing self-imposed budget cuts, Republicans in Congress mull the future of Medicaid

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Facing self-imposed budget cuts, Republicans in Congress mull the future of Medicaid

Congress is forging ahead with its budget for next year, but the most controversial program on the chopping block — Medicaid — is causing a rift within the Republican Party.

Earlier this year, Congress passed a budget blueprint that contains billions of dollars in cuts to federal spending, which House Speaker Mike Johnson (R-La.) promised did not touch Medicaid. But as lawmakers hammer out the details of the spending plan, changes to the popular government-funded healthcare program are looming.

Republicans are scrambling to find creative ways to fulfill budget cuts they voted on without gutting Medicaid, a politically risky move that would endanger healthcare for more than 71 million people nationwide and lead to cascading effects for hospitals and nursing homes.

So far, the options being floated — ramping up eligibility and work requirements and limiting access for immigrants — would have a drastic effect on Medicaid, even as Republicans brand their vision as tackling “waste, fraud and abuse,” a popular line used by Trump administration officials who are downsizing federal government departments and programs.

The GOP is “strengthening Medicaid for people who need it by eliminating things like fraud, waste and abuse, which is a huge problem in the program, including removing illegal aliens,” Johnson said at a news conference Tuesday.

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Other options that lawmakers have considered involve drastically cutting how much money the federal government gives to states that expanded Medicaid coverage under the Affordable Care Act. If the minimum threshold were eliminated, California could lose as much as $156.5 billion in federal funding for the program over the next 10 years, according to an analysis by the Robert Wood Johnson Foundation.

“States can’t really raise that kind of revenue in general,” said Kathy Hempstead, senior policy officer at the foundation. “What states will do is maybe raise some revenue, but they’d have to start cutting services.”

Johnson indicated Tuesday that he’d moved away from that consideration.

Still, advocates warn that other options clamping down on eligibility will inadvertently disadvantage millions of people who qualify for the program.

The budget Congress passed included an order for the House Energy and Commerce Committee, which governs spending on Medicaid, to slash $880 billion over 10 years. The nonpartisan Congressional Budget Office has said that level of reduction is possible only by cutting into Medicaid.

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In a letter to committee leaders Wednesday, the CBO outlined how federal changes to Medicaid would result in a shrinking of the program.

It anticipates that states would spend more themselves on Medicaid, reduce payment rates to healthcare providers, limit optional benefits and reduce enrollment.

Last week, the committee postponed a planned meeting on the bill over continued disagreements among its members. Matt Herdman, state director for Protect Our Care California, saw the delay as a partial win.

“They’ve clearly noticed they have a huge problem on their hands. They have a ton of vulnerable members,” Herdman said. “They would not have pushed this back if they thought this was a done deal.”

But Johnson dismissed the idea that the postponement was “a snag,” saying that after meeting with President Trump over the weekend and reviewing numbers, they decided “it just made sense for us to press pause for a week … to get it right.” The speaker said he is still aiming to pass the budget by Memorial Day.

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In the meantime, Johnson is wrangling members from the far-right flank of the party, who support defunding and reforming Medicaid, and other Republicans, who are beseeching party leaders to avoid forcing them to vote for the cuts.

Twelve members who represent districts with high Medicaid populations — including California Reps. David Valadao (R-Hanford) and Young Kim (R-Anaheim Hills) — sent a letter to House leaders last month, warning that a vote to cut Medicaid would jeopardize their hard-won districts in future elections.

“We cannot and will not support a final reconciliation bill that includes any reduction in Medicaid coverage for vulnerable populations,” the letter read, adding that the lawmakers support reforming the program. It concluded: “Communities like ours won us the majority, and we have a responsibility to deliver on the promises we made.”

Valadao told Politico that he texts and meets with his colleagues in Congress regularly, working on alternative solutions. Valadao has serious motivation to save the program — he represents the California district with the highest percentage of Medicaid recipients, and he lost his congressional seat after voting to repeal the Affordable Care Act in 2017.

His office declined an interview for this article.

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Protests to preserve Medicaid have been sweeping the nation for weeks. The Service Employees International Union, home to many care workers in the U.S., organized several demonstrations outside Republican congressional offices in recent weeks, including Kim’s.

“I’m seeing unbelievable energy about this,” Herdman said. “I don’t think I’ve seen anything quite as large in person since the pandemic on a legislative issue.”

Rep. Debbie Dingell (D-Mich.), who sits on the Energy and Commerce Committee, told reporters Tuesday that she’s been hearing from constituents in her district who rely on Medicaid to sustain their healthcare.

“Medicaid is a lifeline. It keeps children healthy, it helps parents work and it cares for seniors in nursing homes,” Dingell said. “The American people cannot afford Medicaid cuts, especially as the economy is being crashed around them by President Trump.”

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In Their Final Moments, a Pompeii Family Fought to Survive

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In Their Final Moments, a Pompeii Family Fought to Survive

One day in the year 79, Pompeii came under fire. The explosion of nearby Mount Vesuvius sent a mushroom cloud of ash and rock into the atmosphere, pummeling the ancient Roman trading hub and resort in a ceaseless hail of tiny volcanic rocks.

Many residents ran for their lives, trying to find safety with their loved ones before searing volcanic debris buried the estimated 1,500 residents who remained in Pompeii.

In a study published last month in the journal Scavi di Pompei, scientists documented events at one home in the doomed city where a family sought refuge inside a back room by pushing a wooden bed against a door in a vain attempt to stop a flood of volcanic rocks from the sky, known as lapilli.

The small-but-well-appointed residence is known as the House of Helle and Phrixus, after a richly decorated fresco in the dining room. It depicts the mythological siblings Phrixus and Helle escaping their wicked stepmother on a winged ram only to have Helle fall and, ominously, drown in the sea below.

As with many ancient Roman residences, its atrium, an open-roof room centrally located in the home, was used for ventilation and rainwater collection. But on that day, the recess allowed volcanic rock to more rapidly overtake the space. Most Pompeians “had no clue what was happening,” said Gabriel Zuchtriegel, an author of the study and the director of the Archaeological Park of Pompeii. “Many thought the end of the world had come,” he added.

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In the years that followed, the hot ash that eventually buried the home solidified and left an imprint that archaeologists filled with plaster to reconstruct the shape of the wooden bed that remained. The technique helps illustrate the horror of the Pompeian dead in their final moments and how perishable everyday items made of wood, textiles and leather were situated in their environments.

The skeletal remains of four people, most likely members of the same family, were identified in the study. The lapilli, which reached heights as high as nine feet in some locations, could not be controlled, and researchers believe the people made a final attempt to escape, leaving the small room in which they had barricaded themselves. They got only as far as the triclinium, the formal dining room where their remains were found.

“The family in the House of Helle and Phrixus probably died when the so-called pyroclastic flow, an avalanche of hot ash and toxic gas, arrived and parts of the building collapsed,” Dr. Zuchtriegel said.

He and his colleagues suggest that the remains of the four people found in the home were from a family that stayed behind and may have included some enslaved members who worked at the residence. Still, archaeologists don’t know for sure if they lived there or simply took refuge after the homeowners had already escaped.

“It’s not certain that the individuals found in the house as victims were part of the family,” said Marcello Mogetta, an associate professor of Roman art and archaeology at the University of Missouri who was not involved in the study.

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Among the skeletal remains was a bronze bulla that belonged to a child. The ancient amulets were worn like lockets around the necks of young free boys to shield them from danger until they reached adulthood.

“The amulet was supposed to protect them, so there’s a cruel irony to the fact that it didn’t,” said Caitie Barrett, a professor of archaeology at Cornell University who was not involved in the study.

Bourbon explorers sent by Charles III in the 18th century carried out rudimentary excavations of Pompeii that disturbed the skeletal remains of the victims found in the House of Helle and Phrixus. When they tunneled into the residence in search of valuables like jewelry and artwork, they left behind holes in the walls. These early excavators often had little interest in human remains, either in respecting their preservation, dignifying their deaths or studying their material culture.

But today it’s the human toll that feels most prominent for archaeologists and for many of the visitors who regularly pour into Pompeii. Whether or not the remains belonged to those who were indeed family will be something that researchers may try to uncover through DNA analysis in the near future.

Family or not, it doesn’t change the human tragedy of the story.

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“Whatever the nature of their specific relations, they would have been the last people to offer each other comfort at the end,” Dr. Barrett said.

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Antelope Valley residents say they are fed up with rampant dumping, official inaction

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Antelope Valley residents say they are fed up with rampant dumping, official inaction

Eric Eller likes to ride his dirt bikes through the canyons, dry riverbeds and rocky outcroppings of the Antelope Valley in the high desert north of Los Angeles.

Eller’s an off-the-grid kind of guy with a “Mad Max” vibe — living in a house on a remote plot of land next to a jury-rigged trailer where he tinkers with the remnants and pieces of gutted automobiles, motorcycles and other mechanical debris.

But Eller’s isolation was obliterated last June when dozens of big dump trucks began snaking up the dirt road behind his house and discarding their loads into the nearby dry river canyon. The caravan of waste-haulers continued in the days that followed, often arriving after sundown or in the dark hours before dawn.

Two months later, the convoys abruptly stopped. But not before the makeshift dump’s surface had been camouflaged with dirt and mulch — much of which has since blown away, revealing a 30-foot-deep noxious stew of chopped-up concrete, plastic tampon applicators, faded plastic children’s toys, toothbrushes, syringes, empty caulking tubes, two-by-fours, faded books, weathered Styrofoam pipe insulation, plastic bucket tops and more.

EL MIRAGE, CA – APRIL 18: A truck leaves the Circle Green mulch dump site near El Mirage on Friday, April 18, 2025. (Myung J. Chun / Los Angeles Times)

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Across the Antelope Valley, waste trucks are hauling garbage in from the Greater Los Angeles area and Central Valley towns such as Bakersfield, and then dumping it at makeshift sites. Letters, bills and envelopes visible at several of these waste sites in April showed addresses in Pacoima, Los Angeles and Van Nuys, among other cities.

“Illegal dumping has been a problem in the Antelope Valley for decades,” said Chuck Bostwick, a senior field deputy for Los Angeles County Supervisor Kathryn Barger, who represents much of the area. “But it’s gotten worse in the last two or three years, markedly worse.”

In some cases, such as the site behind Eller’s home, the waste sites are flat-out unauthorized. No landowner has given permission to dump at the site, and the waste consists of construction, household and medical debris.

But in others cases, the waste-haulers have the landowners’ permission to dump — but are disposing waste that should be going to landfills equipped to handle household and industrial waste, lawsuits claim.

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In one lawsuit filed in U.S. District Court in Los Angeles, residents claim that major residential waste-hauling companies including Athens Services, California Waste Services and Universal Waste Systems are dumping hazardous substances without authorization.

The suit claims these companies are disguising the construction and demolition debris as “green waste by unlawfully covering this waste with highly flammable wood chips and other organic waste.”

Eric Casper, the president of California Waste Services, said in an email that his company has “never engaged in dumping waste of any kind, at any time, in the Antelope Valley — legal or illegal. Nor anywhere else.”

A sneaker among the trash dumped at Adobe Mountain

A sneaker among the trash dumped at Adobe Mountain near Lancaster, CA. Locals say this was a canyon before it was filled in to hold trash. Photographed on Friday, April 18, 2025.

Athens Services also denied any illegal dumping, saying in a statement that California’s organics recycling law “encourages sending compostable material to third parties such as farmers and other property owners for beneficial use. This is the material that Athens Services produces and distributes.”

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Universal Waste Systems and other companies named in the suit didn’t respond to requests for comment, nor have they filed responses to the federal suit.

Residents say there are more than 100 dump sites scattered throughout the valley — from Lake Los Angeles to the Antelope Valley California Poppy Reserve and north to Mojave — that they contend are unauthorized.

Some of these sites cover hundreds of acres and extend dozens of feet deep. And residents worry that what they can see — from the roads or their homes — is just the tip of a malodorous and malignant iceberg, and that there are probably dozens more they haven’t yet identified.

They complain they are plagued by the toxic, sour and rotten-egg like smells emanating from the discarded trash that cooks in the hot sun and then wafts across their properties.

They also note that the flammable mulch and other materials in the dump, combined with a broiling desert sun, makes for an acute fire risk.

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Between 2020 and 2024, the Los Angeles County Fire Department responded to 42 mulch or trash-related fires in the Antelope Valley, ranging from a quarter-acre to 22 acres, ultimately costing taxpayers roughly $1.6 million to extinguish, according to Los Angeles County documents.

Ashley Mroz, who lives in the Antelope Valley community of Neenach, said a mulch-covered dump site spontaneously combusted near her home last summer.

“It had been smoldering for days and days,” said Mroz, one of the plaintiffs in the federal court suit. “We could not even go outside. The smell was so horrific.”

Trash dumped at Adobe Mountain

Trash dumped at Adobe Mountain near Lancaster, CA. Locals say this was a canyon before it was filled in to hold trash. Photographed on Friday, April 18, 2025.

And the scourge has spread beyond the dump sites: Shredded plastic debris can be seen hanging from roadside Joshua trees and creosote bushes. While a midday view across the arid landscape reveals a sea of glimmering, reflective glass shards, like the tips of cresting waves over a vast, brown ocean.

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According to Antelope Valley residents and the federal suit, property owners in some cases have given permission — and received payments for — waste to be dumped on their land. Not only do these sites pose a nuisance to the neighbors who live adjacent to or near them, in some cases the material being dumped includes industrial and household waste that can leach into the groundwater.

In its statement, Athens pointed out that property owners sometimes give permission to accept material from multiple waste companies.

“To the extent there are any instances of noncompliant material, we are confident the evidence will demonstrate that it came from another source,” Athens said.

Encounter in Adelanto

On a blustery day in April in the high desert town of Adelanto, local residents watched as two dump trucks offloaded their waste into a San Bernardino county-certified organic waste dump site that is surrounded by eight- to 10-foot high berms of mulch-like waste laced with shredded plastic, insulated wires and chopped-up, plastic children’s toys.

Through a break in the berm, the residents could see that the ground around the recently dumped haul glittered in the sunlight with broken glass, while stalks of what appeared to be insulated wires and rigid plastic stood sentry across the 138-acre expanse.

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Two men sitting in a silver GMC pickup truck who were watching the disposal drove over to the gawking residents.

When the residents asked who they were and what the trucks were dumping, the men declined to answer and referred questions to the owner of the property, which The Times later determined to be Kevin Sutton, the owner of a company called Circle Green Inc. Sutton didn’t respond to requests for comment.

As neighbors and a Times reporter and photographer drove away from the site, the silver pickup followed for several miles, tailgating and swerving erratically. The truck turned around only when the small caravan came across a handful of heavily armed California Fish and Game law enforcement agents parked alongside the road.

“It’s the Wild West out here,” said Kristina Brown, a Lancaster property owner who is a party to the federal suit.

A convenient dumping ground

The Antelope Valley’s proximity to Los Angeles and its vast stretches of wild desert make it a prime target for unauthorized dumping.

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Sitting at roughly 3,000 feet above sea level, and surrounded by the Tehachapi, Sierra Pelona and San Gabriel mountains, the valley is also divided by jurisdiction — with Los Angeles, Kern and San Bernardino counties all claiming some territory.

“For decades, our illegal dumping was small-time stuff,” said Bostwick, Supervisor Barger’s field deputy. “It was somebody who had a sofa they couldn’t be bothered to take to the dump or they didn’t want to pay, so they dumped it out in the desert. There was commercial dumping then, but it was small time as well.”

But then the state’s waste laws changed, he said.

Starting in 1989, California began requiring municipalities to divert 50% of their waste away from landfill and toward more sustainable waste management solutions, such as recycling and compost. And as Bostwick noted, the vast open spaces of the Antelope Valley beckoned.

In 2022, lawmakers implemented Senate Bill 1383, which initially mandated the diversion of 50% of all food and organic waste away from landfills, but increased to 75% on Jan. 1, 2025. Another 2020 law closed a loophole that had allowed waste companies to dump green waste in landfill, but not have it counted against them. As a result, the need for dumping grounds increased again.

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Cities, counties and towns that fail to meet the diversion rates risk fines of up to $10,000 a day.

Mounds of dumped loads

Mounds of dumped loads at this location south of E. Avenue M in Lake Los Angeles. The mounds contain mulch, trash and construction debris. The site was found by a resident who followed a truck onto the dirt roads. Photographed on Friday, April 18, 2025.

Residents, lawmakers and experts say while the spirit of these laws is noble, in many areas of the state, the infrastructure to handle the diverted waste is lacking — especially in Southern California, where there is not nearly enough farmland or water to handle the increased volumes of green waste leaving the region’s cities and suburbs.

As a result, waste companies and haulers — trying to keep costs down and maintain city contracts — are tempted to dump the waste wherever they can, while local governments are reluctant to crack down on violations, Bostwick said.

State regulations have made “disposal much more expensive and hard to deal with, and so that’s increased the financial incentives for companies or individuals to just dump illegally,” he said.

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There’s also very little enforcement.

According to Los Angeles County data, while taxpayers spent roughly $1.3 million between 2017 and 2018 to mitigate illegal waste disposal in the region, that number jumped nearly fourfold in 2022-2023, when taxpayers had to foot $4.46 million to mitigate the problem.

At the same time, the number of cases filed with the Environmental Crimes Division of the district attorney’s office decreased from 15 in 2019 to three in 2023.

In February, CalRecycle, the state’s waste agency, finalized emergency orders they say should empower local law enforcement agencies to stop the illegal disposal. Previous regulations only allowed for action against the owner of land where the disposal was occurring. The new orders allow enforcement officials to target parties that are dumping the materials and the facilities that provided the material.

The orders came after officials from the state agency came to visit the area in October 2024 — prodded by Brown, Mroz and other local residents, many of whom have spent years calling state and local officials about the problem.

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Enforcement of these orders, however, is the responsibility of the county, said Lance Klug, a spokesman for the state waste agency.

“Local enforcement agencies can best speak to their enforcement actions to date, and any anticipated next steps, now that emergency regulations are in effect,” he said.

The Los Angeles County Board of Supervisors adopted a measure last year requiring mulch suppliers to take back any contaminated or illegal waste dumped on private land. The measure, which was sponsored by Barger, also directed county agencies to require “stringent record keeping for all land application operations regarding the origin of all incoming loads and testing results from all mulch suppliers.”

County officials couldn’t immediately provide numbers recently when asked how many enforcement actions had been taken.

“There’s literally no enforcement,” said Brown, who worries that the situation is only going to get worse.

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Last month, Eller was riding his dirt bike when he stumbled upon a 60-acre expanse of freshly dumped construction debris, medical waste and compost on a plot of land miles away from any major road.

The tire marks from dump trucks hadn’t yet been blown away by the incessant gales of the high desert. No fences or berms were erected to contain the site, making it impossible to see from the road or along the horizon.

He said it feels like they are living in a real-life game of whack-a-mole: As soon as he and his neighbors identify and report one site, the haulers move onto another.

And they say they feel abandoned by regulators, who they say are doing nothing to stop it.

“It feels like we’re screaming into the wind,” Brown said.

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