Science
Why the U.S. surgeon general wants cancer warning labels on alcoholic drinks
Alcoholic drinks are a leading cause of cancer and should carry a warning about that risk on their labels, the U.S. surgeon general said Friday.
Alcohol is a factor in nearly 100,000 newly diagnosed cancers each year and roughly 20,000 deaths from the disease, U.S. Surgeon General Vivek Murthy said in an advisory intended to focus the public’s attention on the health risk. By comparison, traffic accidents tied to drinking kill about 13,500 Americans each year.
“Alcohol consumption is the third leading preventable cause of cancer in the United States, after tobacco and obesity,” the 22-page advisory said. “While scientific evidence for this connection has been growing over the past four decades, less than half of Americans recognize it as a risk factor for cancer.”
Labels on bottles and cans of alcoholic beverages already warn about drinking while pregnant. They also warn about drinking before driving or operating other machinery. In California, the voter-approved Proposition 65 also requires businesses that serve or sell alcoholic beverages to provide a warning about health risks, including cancer.
Any decision to update or expand the label would require congressional approval, an uncertain prospect. Murthy was appointed by President Biden, who has a little more than two weeks left in office. President-elect Donald Trump has picked Janette Nesheiwat, an executive at a New York-based chain of urgent care clinics, as his nominee for surgeon general.
Executives in the beer, wine and spirits industry said Friday that the scientific data linking alcohol to cancer are mixed.
Amanda Berger, senior vice president at the Distilled Spirits Council, noted that a recent report by the National Academies of Sciences, Engineering, and Medicine found that alcohol was associated with a higher risk of breast cancer but did not find such associations with other types of cancer.
That report also concluded that moderate alcohol consumption is associated with lower risks of all-cause mortality and cardiovascular disease, compared with never consuming alcohol.
“The current health warning on alcohol products has long informed consumers about the potential risks of the consumption of alcohol,” Berger said. “Many lifestyle choices carry potential risks, and it is the federal government’s role to determine any proposed changes to the warning statements based on the entire body of scientific research.”
The surgeon general’s advisory said that cancers of the colorectum, esophagus, liver, mouth, throat and larynx are all tied to drinking, as is breast cancer in women. The risk of developing breast, mouth or throat cancers may increase with less than one drink per day, it said.
(Office of the U.S. Surgeon General)
Yet more than half of Americans are unaware that their drinking behavior affects their cancer risk. A survey by the American Institute for Cancer Research found that 89% of Americans recognized that smoking causes cancer and 53% knew that obesity was a risk factor, but only 45% realized that alcohol could cause cancer as well.
Nearly half of alcohol-related cancers in the U.S. are breast cancers in women, according to a study published by the American Cancer Society. About 1 in every 6 female breast cancers is due to alcohol, and the disease accounts for about 60% of all alcohol-related cancer deaths in women.
As a result, drinking is a bigger cancer risk for women than men. In 2019, about 54,330 women were diagnosed with a cancer that resulted from drinking, as were roughly 42,400 men. About 60% of alcohol-related cancer deaths in women are due to breast cancer, while liver cancer and colorectal cancer are responsible for about 54% of alcohol-related cancer deaths in men.
For women who consume less than one drink a week, the absolute risk of developing an alcohol-related cancer is 16.5%. Having one drink per day increases that risk to 19%, and having two drinks each day raises it to 21.8%, according to the advisory.
For men, drinking once a week is tied to a 10% absolute risk of an alcohol-related cancer. That risk rises to 11.4% by having one drink per day, and to 13.1% by having two drinks per day, the advisory says.
The World Health Organization’s International Agency for Research on Cancer says alcohol is a Group 1 carcinogen, putting it in the company of tobacco, asbestos and ultraviolet radiation. The U.S. National Toxicology Program declared in 2000 that alcohol causes cancer in humans, and organizations including the Centers for Disease Control and Prevention, the National Cancer Institute, the American Cancer Society and the American Assn. for Cancer Research agree that at least seven kinds of cancer are related to drinking.
There is also evidence to suggest that drinking contributes to skin, prostate, pancreatic and stomach cancers, though more research is needed, the surgeon general’s advisory says.
Scientists first linked alcohol consumption to certain cancers nearly 50 years ago, and the evidence showing that drinking is a risk factor for at least seven types of cancer has grown since then, the advisory says.
For instance, an observational study of 28 million people in 195 countries and territories found that the more alcohol a person consumed, the higher their risk of cancer. A study involving more than 1 million women found that those who had up to 1 drink per day were 10% more likely to get breast cancer compared with those who abstained. Likewise, a study with 36,000 people found that those who consumed about a drink per day were 40% more likely to develop mouth cancer than people who didn’t drink.
Laboratory experiments have shown how alcohol leads to cancer.
When alcohol is metabolized in the body, it breaks down into a chemical called acetaldehyde that can attach itself to DNA. The resulting damage can trigger the uncontrolled cell growth that leads to cancer.
Drinking also creates unstable molecules called reactive oxygen species that can interfere with DNA, proteins and essential fats. They also increase inflammation, which makes the body more hospitable to cancer.
There is also evidence that alcohol fuels breast cancers by affecting levels of estrogen and other hormones, and that other kinds of carcinogens — such as those found in tobacco smoke — are more easily absorbed in the body when they are dissolved in alcohol.
The companies selling alcoholic beverages say they have long urged consumers to drink the beverages safely.
“The U.S. beer industry has been a champion of responsible consumption for decades,” a spokesperson for the Beer Institute said Friday. “We encourage adults of legal drinking age to make choices that best fit their personal circumstances, and if they choose to drink, to consume alcohol beverages in moderation.”
Dr. Laura Catena, a winemaker and physician, said that she would “welcome any kind of alert or communication from the surgeon general about the cancer risks of heavy alcohol drinking,” but that it shouldn’t go beyond the established science.
The American Assn. for Cancer Research says alcohol use is responsible for 5.4% of all cancer cases in the U.S. That makes it a bigger risk factor than exposure to UV radiation, poor diet, and infections from pathogens like hepatitis and the human papillomavirus. (For comparison, 19.3% of U.S. cancers are attributable to smoking, according to the association.)
Studies suggest that people who cut back on alcohol or eliminate it can reduce their risk of these cancers by 8%, and reduce their overall cancer risk by 4%.
The Dietary Guidelines for Americans from the U.S. Departments of Agriculture and Health and Human Services say there is no health reason for nondrinkers to start consuming alcohol. Those who do drink can minimize their risk by limiting their intake to no more than one drink per day for women and no more than two drinks per day for men.
A 5-ounce glass of wine, 12-ounce bottle of beer or 1.5-ounce tumbler of distilled spirits count as a single drink.
The surgeon general’s advisory says about 83% of alcohol-related cancer deaths occur in people who exceed those limits. But that means 17% of deaths were in people who engaged in moderate drinking.
Science
Diablo Canyon clears last California permit hurdle to keep running
Central Coast Water authorities approved waste discharge permits for Diablo Canyon nuclear plant Thursday, making it nearly certain it will remain running through 2030, and potentially through 2045.
The Pacific Gas & Electric-owned plant was originally supposed to shut down in 2025, but lawmakers extended that deadline by five years in 2022, fearing power shortages if a plant that provides about 9 percent the state’s electricity were to shut off.
In December, Diablo Canyon received a key permit from the California Coastal Commission through an agreement that involved PG&E giving up about 12,000 acres of nearby land for conservation in exchange for the loss of marine life caused by the plant’s operations.
Today’s 6-0 vote by the Central Coast Regional Water Board approved PG&E’s plans to limit discharges of pollutants into the water and continue to run its “once-through cooling system.” The cooling technology flushes ocean water through the plant to absorb heat and discharges it, killing what the Coastal Commission estimated to be two billion fish each year.
The board also granted the plant a certification under the Clean Water Act, the last state regulatory hurdle the facility needed to clear before the federal Nuclear Regulatory Commission (NRC) is allowed to renew its permit through 2045.
The new regional water board permit made several changes since the last one was issued in 1990. One was a first-time limit on the chemical tributyltin-10, a toxic, internationally-banned compound added to paint to prevent organisms from growing on ship hulls.
Additional changes stemmed from a 2025 Supreme Court ruling that said if pollutant permits like this one impose specific water quality requirements, they must also specify how to meet them.
The plant’s biggest water quality impact is the heated water it discharges into the ocean, and that part of the permit remains unchanged. Radioactive waste from the plant is regulated not by the state but by the NRC.
California state law only allows the plant to remain open to 2030, but some lawmakers and regulators have already expressed interest in another extension given growing electricity demand and the plant’s role in providing carbon-free power to the grid.
Some board members raised concerns about granting a certification that would allow the NRC to reauthorize the plant’s permits through 2045.
“There’s every reason to think the California entities responsible for making the decision about continuing operation, namely the California [Independent System Operator] and the Energy Commission, all of them are sort of leaning toward continuing to operate this facility,” said boardmember Dominic Roques. “I’d like us to be consistent with state law at least, and imply that we are consistent with ending operation at five years.”
Other board members noted that regulators could revisit the permits in five years or sooner if state and federal laws changes, and the board ultimately approved the permit.
Science
Deadly bird flu found in California elephant seals for the first time
The H5N1 bird flu virus that devastated South American elephant seal populations has been confirmed in seals at California’s Año Nuevo State Park, researchers from UC Davis and UC Santa Cruz announced Wednesday.
The virus has ravaged wild, commercial and domestic animals across the globe and was found last week in seven weaned pups. The confirmation came from the U.S. Department of Agriculture’s National Veterinary Services Laboratory in Ames, Iowa.
“This is exceptionally rapid detection of an outbreak in free-ranging marine mammals,” said Professor Christine Johnson, director of the Institute for Pandemic Insights at UC Davis’ Weill School of Veterinary Medicine. “We have most likely identified the very first cases here because of coordinated teams that have been on high alert with active surveillance for this disease for some time.”
Since last week, when researchers began noticing neurological and respoiratory signs of the disease in some animals, 30 seals have died, said Roxanne Beltran, a professor of ecology and evolutionary biology at UC Santa Cruz. Twenty-nine were weaned pups and the other was an adult male. The team has so far confirmed the virus in only seven of the dead pups.
Infected animals often have tremors convulsions, seizures and muscle weakness, Johnson said.
Beltran said teams from UC Santa Cruz, UC Davis and California State Parks monitor the animals 260 days of the year, “including every day from December 15 to March 1” when the animals typically come ashore to breed, give birth and nurse.
The concerning behavior and deaths were first noticed Feb. 19.
“This is one of the most well-studied elephant seal colonies on the planet,” she said. “We know the seals so well that it’s very obvious to us when something is abnormal. And so my team was out that morning and we observed abnormal behaviors in seals and increased mortality that we had not seen the day before in those exact same locations. So we were very confident that we caught the beginning of this outbreak.”
In late 2022, the virus decimated southern elephant seal populations in South America and several sub-Antarctic Islands. At some colonies in Argentina, 97% of pups died, while on South Georgia Island, researchers reported a 47% decline in breeding females between 2022 and 2024. Researchers believe tens of thousands of animals died.
More than 30,000 sea lions in Peru and Chile died between 2022 and 2024. In Argentina, roughly 1,300 sea lions and fur seals perished.
At the time, researchers were not sure why northern Pacific populations were not infected, but suspected previous or milder strains of the virus conferred some immunity.
The virus is better known in the U.S. for sweeping through the nation’s dairy herds, where it infected dozens of dairy workers, millions of cows and thousands of wild, feral and domestic mammals. It’s also been found in wild birds and killed millions of commercial chickens, geese and ducks.
Two Americans have died from the virus since 2024, and 71 have been infected. The vast majority were dairy or commercial poultry workers. One death was that of a Louisiana man who had underlying conditions and was believed to have been exposed via backyard poultry or wild birds.
Scientists at UC Santa Cruz and UC Davis increased their surveillance of the elephant seals in Año Nuevo in recent years. The catastrophic effect of the disease prompted worry that it would spread to California elephant seals, said Beltran, whose lab leads UC Santa Cruz’s northern elephant seal research program at Año Nuevo.
Johnson, the UC Davis researcher, said the team has been working with stranding networks across the Pacific region for several years — sampling the tissue of birds, elephant seals and other marine mammals. They have not seen the virus in other California marine mammals. Two previous outbreaks of bird flu in U.S. marine mammals occurred in Maine in 2022 and Washington in 2023, affecting gray and harbor seals.
The virus in the animals has not yet been fully sequenced, so it’s unclear how the animals were exposed.
“We think the transmission is actually from dead and dying sea birds” living among the sea lions, Johnson said. “But we’ll certainly be investigating if there’s any mammal-to-mammal transmission.”
Genetic sequencing from southern elephant seal populations in Argentina suggested that version of the virus had acquired mutations that allowed it to pass between mammals.
The H5N1 virus was first detected in geese in China in 1996. Since then it has spread across the globe, reaching North America in 2021. The only continent where it has not been detected is Oceania.
Año Nuevo State Park, just north of Santa Cruz, is home to a colony of some 5,000 elephant seals during the winter breeding season. About 1,350 seals were on the beach when the outbreak began. Other large California colonies are located at Piedras Blancas and Point Reyes National Sea Shore. Most of those animals — roughly 900 — are weaned pups.
It’s “important to keep this in context. So far, avian influenza has affected only a small proportion of the weaned at this time, and there are still thousands of apparently healthy animals in the population,” Beltran said in a press conference.
Public access to the park has been closed and guided elephant seal tours canceled.
Health and wildlife officials urge beachgoers to keep a safe distance from wildlife and keep dogs leashed because the virus is contagious.
Science
When slowing down can save a life: Training L.A. law enforcement to understand autism
Kate Movius moved among a roomful of Los Angeles County sheriff’s deputies, passing out a pop trivia quiz and paper prism glasses.
She told them to put on the vision-distorting glasses, and to write with their nondominant hand. As they filled out the tests, Movius moved about the City of Industry classroom pounding abruptly on tables. Then came the cowbell. An aide flashed the overhead lights on and off at random. The goal was to help the deputies understand the feeling of sensory overwhelm, which many autistic people experience when incoming stimulation exceeds their capacity to process.
“So what can you do to assist somebody, or de-escalate somebody, or get information from someone who suffers from a sensory disorder?” Movius asked the rattled crowd afterward. “We can minimize sensory input. … That might be the difference between them being able to stay calm and them taking off.”
Movius, founder of the consultancy Autism Interaction Solutions, is one of a growing number of people around the U.S. working to teach law enforcement agencies to recognize autistic behaviors and ensure that encounters between neurodevelopmentally disabled people and law enforcement end safely.
She and City of Industry Mayor Cory Moss later passed out bags filled with tools donated by the city to aid interactions: a pair of noise-damping headphones to decrease auditory input, a whiteboard, a set of communication cards with words and images to point to, fidget toys to calm and distract.
“The thing about autistic behavior when it comes to law enforcement is a lot of it may look suspicious, and a lot of it may feel very disrespectful,” said Movius, who is also the parent of an autistic 25-year-old man. Responding officers, she said, “are not coming in thinking, ‘Could this be a developmentally disabled person?’ I would love for them to have that in the back of their minds.”
A sheriff’s deputy reads a pamphlet on autism during the training program.
(Genaro Molina / Los Angeles Times)
Autism spectrum disorder is a developmental condition that manifests differently in nearly every person who has it. Symptoms cluster around difficulties in communication, social interaction and sensory processing.
An autistic person stopped by police might hold the officer’s gaze intensely or not look at them at all. They may repeat a phrase from a movie, repeat the officer’s question or temporarily lose their ability to speak. They might flee.
All are common involuntary responses for an autistic person in a stressful situation, which a sudden encounter with law enforcement almost invariably is. To someone unfamiliar with the condition, all could be mistaken for intoxication, defiance or guilt.
Autism rates in the U.S. have increased nearly fivefold since the Centers for Disease Control began tracking diagnoses in 2000, a rise experts attribute to broadening diagnostic criteria and better efforts to identify children who have the condition.
The CDC now estimates that 1 in 31 U.S. 8-year-olds is autistic. In California, the rate is closer to 1 in 22 children.
As diverse as the autistic population is, people across the spectrum are more likely to be stopped by law enforcement than neurotypical peers.
About 15% of all people in the U.S. ages 18 to 24 have been stopped by police at some point in their lives, according to federal data. While the government doesn’t track encounters for disabled people specifically, a separate study found that 20% of autistic people ages 21 to 25 have been stopped, often after a report or officer observation of a person behaving unusually.
Some of these encounters have ended in tragedy.
In 2021, Los Angeles County sheriff’s deputies shot and permanently paralyzed a deaf autistic man after family members called 911 for help getting him to a hospital.
Isaias Cervantes, 25, had become distressed about a shopping trip and started pushing his mother, his family’s attorney said at the time. He resisted as two deputies attempted to handcuff him and one of the deputies shot him, according to a county report.
In 2024, Ryan Gainer’s family called 911 for support when the 15-year-old became agitated. Responding San Bernardino County sheriff‘s deputies shot and killed him outside his Apple Valley home.
Last year, police in Pocatello, Idaho, shot Victor Perez, 17, through a chain-link fence after the nonspeaking teenager did not heed their shouted commands. He died from his injuries in April.
Sheriff’s deputies take a trivia quiz using their non-writing hands, while wearing vision-distorting glasses, as Kate Movius, standing left, and Industry Mayor Cory Moss, right, ring cowbells. The idea was to help them understand the sensory overwhelm some autistic people experience.
(Genaro Molina / Los Angeles Times)
As early as 2001, the FBI published a bulletin on police officers’ need to adjust their approach when interacting with autistic people.
“Officers should not interpret an autistic individual’s failure to respond to orders or questions as a lack of cooperation or as a reason for increased force,” the bulletin stated. “They also need to recognize that individuals with autism often confess to crimes that they did not commit or may respond to the last choice in a sequence presented in a question.”
But a review of multiple studies last year by Chapman University researchers found that while up to 60% of officers have been on a call involving an autistic person, only 5% to 40% had received any training on autism.
In response, universities, nonprofits and private consultants across the U.S. have developed curricula for law enforcement on how to recognize autistic behaviors and adapt accordingly.
The primary goal, Movius told deputies at November’s training session, is to slow interactions down to the greatest extent possible. Many autistic people require additional time to process auditory input and verbal responses, particularly in unfamiliar circumstances.
If at all possible, Movius said, wait 20 seconds for a response after asking a question. It may feel unnaturally long, she acknowledged. But every additional question or instruction fired in that time — what’s your name? Did you hear me? Look at me. What’s your name? — just decreases the likelihood that a person struggling to process will be able to respond at all.
Moss’ son, Brayden, then 17, was one of several teenagers and young adults with autism who spoke or wrote statements to be read to the deputies. The diversity of their speech patterns and physical mannerisms showed the breadth of the spectrum. Some were fluently verbal, while others communicated through signs and notes.
“This population is so diverse. It is so complicated. But if there’s anything that we can show [deputies] in here that will make them stop and think, ‘Hey, what if this is autism?’ … it is saving lives,” Moss said.
Mayor Cory Moss, left, and Kate Movius hug at the end of the training program last November. Movius started Autism Interaction Solutions after her son was born with profound autism.
(Genaro Molina / Los Angeles Times)
Some disability advocates cautioned that it takes more than isolated training sessions to ensure encounters end safely.
Judy Mark, co-founder and president of the nonprofit Disability Voices United, says she trained thousands of officers on safe autism interactions but stopped after Cervantes’ shooting. She now urges families concerned about an autistic child’s safety to call an ambulance rather than law enforcement.
“I have significant concern about these training sessions,” Mark said. “People get comfort from it, and the Sheriff’s Department can check the box.”
While not a panacea, supporters argue that a brief course is better than no preparation at all. Some years ago, Movius received a letter from a man whose profoundly autistic son slipped away as the family loaded their car at the beach. He opened the unlocked door of a police vehicle, climbed into the back and began to flail in distress.
Though surprised, the officer seated at the wheel de-escalated the situation and helped the young man find his family, the father wrote to Movius. He had just been to her training.
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