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Alzheimer’s risk may increase with light pollution, new study finds

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Alzheimer’s risk may increase with light pollution, new study finds

Exposure to outdoor light at night could put people at a higher risk of developing Alzheimer’s disease (AD), according to a new study published in Frontiers in Neuroscience.

“We show that, in the U.S., there is a positive association between AD prevalence and exposure to light at night, particularly in those under the age of 65,” first author Dr. Robin Voigt-Zuwala, an associate professor at Rush University Medical Center in Chicago, said in a press release.

“Nightly light pollution, a modifiable environmental factor, may be an important risk factor for AD.”

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Some common sources of artificial light include streetlamps, vehicles, illuminated signs, office buildings and other lighted structures.

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Exposure to outdoor light at night could put people at a higher risk of developing Alzheimer’s disease, according to a new study. (iStock)

In the study, researchers analyzed light pollution maps across the country, ranking each state’s “nighttime intensity data.” They then looked at the corresponding levels of Alzheimer’s disease.

For people 65 and older, light pollution was a greater risk factor than obesity, depression, alcohol abuse and chronic kidney disease, the researchers found.

Other risk factors, however — such as high blood pressure, diabetes and stroke — outweighed the risk of light pollution for that age group.

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Those under 65 years old, however, appeared to be more sensitive to nighttime lighting exposure, which increased their Alzheimer’s risk more than any other risk factor.

“Certain genotypes,  which influence early-onset AD, impact the response to biological stressors, which could account for increased vulnerability to the effects of nighttime light exposure,” Voigt-Zuwala said in the release. 

Previous studies have shown that light pollution is increasing by around 10% each year, causing the night sky to become brighter and reaching approximately 80% of the global population. (iStock)

“Additionally, younger people are more likely to live in urban areas and have lifestyles that may increase exposure to light at night.”

Risks of light pollution

Previous studies have shown that light pollution is increasing by around 10% each year, causing the night sky to become brighter and reaching approximately 80% of the global population.

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Light pollution has been shown to disrupt the circadian rhythm and reduce production of the hormone melatonin, which can lead to sleep problems.

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Insufficient sleep, in turn, is a proven risk factor for neurodegenerative diseases like Alzheimer’s.

One recent study published in the American Journal of Preventive Medicine found that getting only five hours of sleep per night can raise the risk of dementia by 30% for people 50 and older.

Among adults who have sleep-related movement disorders, the likelihood of dementia is nearly four times higher, the same study found.

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“Constant light exposure disrupts the circadian rhythm and limits the amount of time the brain is in the deeper, restorative stages of sleep.”

Dr. Earnest Lee Murray, a board-certified neurologist at Jackson-Madison County General Hospital in Jackson, Tennessee, was not involved in the study, but spoke with Fox News Digital about the environmental factors that can affect the prevalence of dementia like Alzheimer’s. 

“We have known for some time that the lack of quality sleep has detrimental health effects, and this includes an increased risk of developing cognitive difficulties later in life,” he said.

Researchers analyzed light pollution maps across the country, ranking each state’s “nighttime intensity data.” They then looked at the corresponding levels of Alzheimer’s disease. (iStock)

The brain relies on a circadian rhythm to restore itself during sleep, the doctor added.

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“Constant light exposure disrupts this circadian rhythm and limits the amount of time the brain is in the deeper, restorative stages of sleep,” Murray said.

Ways to reduce light exposure

Based on the findings, the researchers recommend people take steps to reduce their exposure to light pollution.

“Awareness of the association should empower people — particularly those with risk factors for AD — to make easy lifestyle changes,” said Voigt-Zuwala. 

“Easy-to-implement changes include using blackout curtains or sleeping with eye masks,” the researchers said. “This is useful especially for those living in areas with high light pollution.” (iStock)

“Easy-to-implement changes include using blackout curtains or sleeping with eye masks. This is useful especially for those living in areas with high light pollution.”

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Although the study only examined outdoor light exposure, the researchers also suggested making changes indoors, such as installing dimmers, using blue light filters and swapping to warm lightbulbs instead of cool.

Some have pushed for regulations to control outdoor lighting exposure.

      

“The legislation against light pollution is usually very weak and/or not well implemented,” Fabio Falchi, Ph.D., a researcher at the Light Pollution Science and Technology Institute in Italy, told Fox News Digital.

“It is time to start putting limits on this pollutant, too, as with the rest of the other common pollutants.”

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The study did have some limitations, the researchers acknowledged.

The data was gathered from a subset of the U.S. population, they stated, and individual outcomes may vary based on how long someone lived in an area with high light exposure.

“It can clearly be implied that exposure to constant light from devices can lead to cognitive issues later in life,” a neurologist told Fox News Digital. (iStock)

“The study only looked at outdoor light pollution and did not include any type of data from indoor light pollution, such as from cellphones or televisions,” Murray noted.

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“However, it can clearly be implied that exposure to constant light from devices can lead to cognitive issues later in life, reinforcing the importance of limiting nocturnal light exposure from cell phones and other devices.”

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The researchers called for more studies into the association between light pollution and Alzheimer’s.

Fox News Digital reached out to the study authors requesting comment.

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Scientists make startling discovery when examining prostate cancer tissue

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Scientists make startling discovery when examining prostate cancer tissue

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Small fragments of plastic were found in the tumors of most prostate cancer patients, according to a new study from NYU Langone Health. 

In past studies, microplastics have been found in almost every human organ and in bodily fluids, but their impact on human health still isn’t fully understood.

The researchers analyzed tissue samples from 10 patients with prostate cancer who underwent surgery to remove the entire organ. 

Using visuals of both benign samples and tumor samples, as well as specialized equipment, the scientists identified plastic particles in 90% of the tumor samples and 70% of benign tissue samples, according to the study press release.

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In past studies, microplastics were found in almost every single human organ along with bodily fluids, even the placenta. (iStock)

The cancerous tissue contained on average more than double the amount of plastic as healthy prostate tissue samples, the study found. This equates to about 40 micrograms of plastic per gram of tissue compared to 16 micrograms.

Researchers avoided contaminating the samples with other plastics by substituting standard tools with those made of aluminum, cotton and other non-plastic material, the release noted.

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The scientists say this is the first direct evidence linking microplastics to prostate cancer.

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“By uncovering yet another potential health concern posed by plastic, our findings highlight the need for stricter regulatory measures to limit the public’s exposure to these substances, which are everywhere in the environment,” said senior study author Vittorio Albergamo, assistant professor in the department of pediatrics at NYU Grossman School of Medicine, in the release.

Using visuals of both benign samples and tumor samples, as well as specialized equipment, the scientists identified plastic particles in 90% of the tumor samples and 70% of benign tissue samples. (iStock)

The study findings were presented during the American Society of Clinical Oncology’s Genitourinary Cancers Symposium in San Francisco on Feb. 26.

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“What is most striking is not that microplastics were detected, but that they were found embedded within tumor tissue itself,” Dr. David Sidransky, oncologist and medical advisor at SpotitEarly, a startup that offers an at-home breath-based test to detect early-stage cancer, told Fox News Digital.

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“While complete avoidance is unrealistic, people can take practical steps to reduce exposure.”

“We already know microplastics are present in water, air, blood and even placental tissue. Their detection in prostate tumors suggests systemic distribution and long-term bioaccumulation,” added Maryland-based Sidransky, who was not involved in the study.

Study limitations

Albergamo cautioned that a larger sample is needed to confirm the findings. Additionally, Sidransky noted that the presence of microplastics alone does not prove they cause cancer.

“Tumors can act as ‘biologic sinks,’ meaning they may accumulate circulating particles simply because of altered vasculature and permeability,” he said.

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A key unanswered question, according to the doctor, is whether microplastics are biologically active in ways that “promote DNA damage, immune modulation or chronic inflammation within the prostate.”

About one in eight men in the U.S. will be diagnosed with prostate cancer at some point in their lifetime, according to the Centers for Disease Control and Prevention.

The most actionable step men can take is appropriate screening and early detection, according to doctors. (iStock)

For those concerned about microplastics, Sidransky offered some insights.

“I believe the appropriate response is curiosity, not panic, and a commitment to understand more,” he said.

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“While complete avoidance is unrealistic, people can take practical steps to reduce exposure, such as minimizing heating food in plastic containers, reducing bottled water consumption when possible, and favoring glass or stainless steel alternatives.”

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The most actionable step men can take, however, is getting appropriate screenings to help ensure early detection, according to the doctor. Screening discussions should be individualized based on age, family history and other risk factors.

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How a Vegan Diet Can Help You Lose Weight 8X Faster

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How a Vegan Diet Can Help You Lose Weight 8X Faster


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Cancer-linked herbicide in the spotlight after controversial order: ‘Toxic by design’

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Cancer-linked herbicide in the spotlight after controversial order: ‘Toxic by design’

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There has been a shake-up in the Make America Healthy Again movement regarding glyphosate, a widely used herbicide that has been the subject of significant controversy.

The debate follows an executive order signed by President Donald Trump that ensures an adequate supply of elemental phosphorus and glyphosate-based herbicides related to national defense.

MAHA supporters have previously pushed a pesticide-free agenda, warning of potential health harms caused by glyphosate.

Dr. Marc Siegel, Fox News senior medical analyst, said he believes there is sufficient evidence linking glyphosate to neurodegenerative diseases, including ALS, Parkinson’s and multiple sclerosis, to warrant limiting exposure.

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President Donald Trump signed an executive order that ensures an adequate supply of elemental phosphorus and glyphosate-based herbicides related to national defense. (AP Photo/Charlie Neibergall)

“With Parkinson’s, this association appears to be due to the gut, vagus nerve and brain axis, where the exposure affects the microbiome in the gut, which then ascends slowly up to the brain, causing the neurodegenerative disease years later,” Siegel told Fox News Digital.

“There is also a growing association being found between high-dose glyphosate or occupational exposure and metabolic disorders, liver disease and some cancers, specifically lymphoma.”

He added, “Growing research backs this. I favor limiting it.”

“When we apply them across millions of acres and allow them into our food system, we put Americans at risk.”

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Studies have shown that glyphosate, which is used in products such as Roundup, owned by Monsanto, could raise cancer risk.

In one University of Washington study published in the journal Mutation Research, researchers found that exposure to it increased the risk of non-Hodgkin lymphoma by 41%.

The nonprofit Investigate Midwest, which analyzed data from both the U.S. Geological Survey and the National Cancer Institute, also recently found that pesticides may contribute to cancer rates.

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Among the top 500 counties for per-square-mile pesticide use, more than 60% had cancer rates above the national average of 460 cases per 100,000 people, according to the report.

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Investigate Midwest, which is based in Illinois, interviewed more than 100 farmers, environmentalists, lawmakers and scientists as part of a partnership with the Pulitzer Center’s StoryReach U.S. Fellowship.

Among the top 500 counties for per-square-mile pesticide use, more than 60% had cancer rates above the national average of 460 cases per 100,000 people, according to one study. (iStock)

Iowa, which used 53 million pounds of pesticides last year, holds the nation’s title for second-highest cancer rate.

Bill Billings, a resident of Red Oak, Iowa, was diagnosed with cancer in 2014. 

“The cancer specialist said, very directly, (my) cancer is a result of being exposed to chemicals,” Billings said in the report.

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Kelly Ryerson, founder of Glyphosate Facts and owner of the Instagram account @glyphosategirl, told Fox News Digital her journey researching the herbicide began with her own health struggles.

Ryerson, who is based in California, previously struggled with chronic illness and autoimmune issues, which she said improved when she stopped eating gluten. 

Iowa, which used 53 million pounds of pesticides last year, holds the nation’s title for second-highest cancer rate. (iStock)

After attending a medical conference at Columbia University’s Celiac Disease Center, Ryerson began to question modern farming practices rather than the gluten itself.

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“A lot of times, farmers are spraying Roundup on our grains right before harvest to facilitate an easier harvest,” she said. “After that easier harvest, because everything’s dry at the same time, those crops go directly to the mill and may end up in our food supply, at alarmingly high levels.”

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In 2015, the International Agency for Research on Cancer (IARC), part of the World Health Organization framework, classified glyphosate as “probably carcinogenic to humans.”

The classification was based on limited evidence of cancer in humans (notably non-Hodgkin lymphoma in some studies) and sufficient evidence in experimental animals.

“President Trump’s executive order reinforces the critical need for U.S. farmers to have access to essential, domestically produced crop protection tools, such as glyphosate,” a Monsanto spokesperson said. (Wolf von Dewitz/picture alliance via Getty Images)

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A spokesperson for Monsanto told Fox News Digital it will comply with Trump’s order to produce glyphosate and elemental phosphorus.

“President Trump’s executive order reinforces the critical need for U.S. farmers to have access to essential, domestically produced crop protection tools, such as glyphosate,” the spokesperson said.

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HHS Secretary Robert F. Kennedy Jr. has long been a vocal critic of Roundup, working with his legal team in 2018 to award $289 million to a man who alleged the weed killer caused his non-Hodgkin lymphoma, according to reports.

Following backlash to Trump’s executive order, Kennedy said he supports the order but acknowledged that “pesticides and herbicides are toxic by design, engineered to kill living organisms.”

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“When we apply them across millions of acres and allow them into our food system, we put Americans at risk,” he posted on X. “Chemical manufacturers have paid tens of billions of dollars to settle cancer claims linked to their products, and many agricultural communities report elevated cancer rates and chronic disease.”

Fox News Digital reached out to the White House for comment.

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