Health
Early Parkinson’s could be detected decades before symptoms with simple blood test
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A new study from Chalmers University of Technology in Sweden, along with Oslo University Hospital in Norway, may have discovered a way to detect biomarkers of Parkinson’s disease in the blood up to decades earlier.
In the very early stages of the disease, the body goes through changes related to DNA repair and stress in cells. These changes leave detectable clues in the blood before major brain damage occurs, according to a press release for the study.
This could allow for early detection of Parkinson’s, when treatments might have a better chance of slowing or preventing serious damage.
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The processes of DNA repair and cellular stress response can occur for up to 20 years in Parkinson’s patients before motor symptoms fully develop, according to the researchers.
The team used machine learning to discover patterns linked to these processes, which were not found in healthy individuals or patients who were already diagnosed with Parkinson’s.
European researchers discovered a way to detect early Parkinson’s disease via a blood test. (iStock)
Annikka Polster, assistant professor at the Department of Life Sciences at Chalmers who led the study, suggested in a statement that the study has found an “important window of opportunity” in which the disease can be detected “before motor symptoms caused by nerve damage in the brain appear.”
“The fact that these patterns only show at an early stage and are no longer activated when the disease has progressed further also makes it interesting to focus on the mechanisms to find future treatments,” she added.
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Polster confirmed that the study highlighted biomarkers that “likely reflect some of the early biology of the disease,” which “paves the way for broad screening tests via blood samples: a cost-effective, easily accessible method.”
The findings were published in npj Parkinson’s Disease.
Blood tests for early Parkinson’s diagnosis could become more common, researchers predicted. (iStock)
The researchers plan to further develop tools to more easily detect these active mechanisms and understand how they work, according to the university.
The team predicts that, within five years, blood tests for early Parkinson’s diagnoses could become more common within clinical practice. They are also optimistic about the development of new drugs to prevent or treat the disease.
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“If we can study the mechanisms as they happen, it could provide important keys to understanding how they can be stopped and which drugs might be effective,” Polster said.
“This may involve new drugs, but also drug repurposing, where we can use drugs developed for diseases other than Parkinson’s because the same gene activities or mechanisms are active.”
More than 10 million people around the world are estimated to be living with Parkinson’s disease. (iStock)
Study limitations
The researchers acknowledged that the study had some limitations, including that the gene activity measured in the blood only partly matches what’s happening in the brain.
External factors, such as medication use, may have affected the results, they added.
Also, the study population may not represent all people, so findings may not apply broadly.
By the numbers
More than 10 million people around the world are estimated to be living with Parkinson’s disease, according to the Parkinson’s Foundation. About 90,000 people in the U.S. are diagnosed each year.
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Numbers are expected to continue rising because Parkinson’s is the second-most common neurodegenerative disease after Alzheimer’s.
While research is advancing, there is no cure for the disease, although medications are available to manage symptoms.
Common motor symptoms of Parkinson’s include tremors, slowed movement, muscle stiffness, balance and walking difficulties. (iStock)
Common motor symptoms include tremors, slowed movement, muscle stiffness, balance and walking difficulties, a shuffling gait and freezing episodes.
Non-motor symptoms include loss of smell, sleep problems, constipation, fatigue, depression or anxiety, speech and swallowing changes, cognitive slowing and reduced facial expression, according to Parkinson’s Foundation and Mayo Clinic.
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Danish Anwer, a doctoral student at the Department of Life Sciences at Chalmers and the study’s first author, detailed in a statement how Parkinson’s affects the brain.
“By the time the motor symptoms of Parkinson’s disease appear, 50% to 80% of the relevant brain cells are often already damaged or gone,” he said. “The study is an important step toward facilitating early identification of the disease and counteracting its progression before it has gone this far.”
“By the time you have actual motor symptoms … a large majority of affected cells have been damaged and destroyed.”
Fox News senior medical analyst Dr. Marc Siegel agreed that Parkinson’s is a “very difficult disease” with an increasing global impact.
“By the time you have actual motor symptoms affecting gait, tremor, etc., a large majority of affected cells have been damaged and destroyed,” he told Fox News Digital.
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Siegel called the new research “exciting,” suggesting that it “opens the door for earlier and more effective diagnosis and treatment.”
Fox News Digital reached out to the study authors for comment.
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Taking a GLP-1 medication for weight loss may improve male fertility, according to experts.
Research presented this week at ENDO 2026, the Endocrine Society’s annual meeting in Chicago, explored how obesity is strongly linked to fertility problems in men.
Excess weight can contribute to dysregulation of the hypothalamic-pituitary-gonadal (HPG) axis — the hormone system that regulates testosterone production — and functional hypogonadism, a condition in which testosterone levels are abnormally low because of disrupted hormone signaling. These changes can also impair semen quality.
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The researchers evaluated how GLP-1 weight-loss drugs impact reproductive hormones and metabolic outcomes, analyzing data of men between the ages of 18 and 65 who were taking one of the medications, according to a press release.
The systematic review of five randomized controlled trials focused on measuring testosterone, brain hormones involved in testosterone and sperm production, and a protein that carries sex hormones in the blood. Semen quality, weight and BMI, cholesterol and blood sugar were also measured.
Men with obesity and low testosterone linked to obesity may experience improved testosterone, sperm quality and metabolic heath while taking a GLP-1, the study found. (iStock)
The results suggested that GLP-1 medications do not suppress male hormones. Men with obesity and low testosterone linked to obesity may experience improved testosterone, sperm quality and metabolic health, especially during weight loss.
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In one four-week study, dulaglutide showed no significant changes in reproductive hormones or sexual function.
In a separate 16-week trial, liraglutide improved hormones in obese men with functional hypogonadism, meaning low testosterone was likely related to obesity. The review found that liraglutide was better for health outcomes than hormone replacement therapy.
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Another liraglutide study reported improved sperm concentration and count.
The study authors concluded that GLP-1s “do not appear to acutely suppress the male HPG axis and may improve reproductive hormones and semen parameters in obese hypogonadal men, largely within the context of weight loss.” (iStock)
A 24-week trial of semaglutide, known commercially as Ozempic and Wegovy, saw improvement in sperm shape and bad cholesterol, while preserving total testosterone.
As only five trials were included, the small evidence base suggests more research is necessary to prove further association.
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In an abstract of the research, the authors summed up that GLP-1s “do not appear to acutely suppress the male HPG axis and may improve reproductive hormones and semen parameters in obese hypogonadal men, largely within the context of weight loss.”
“However, evidence remains limited and heterogeneous, underscoring the need for larger RCTs explicitly powered to assess male reproductive outcomes,” they wrote.
“This provides early evidence that GLP-1 medications taken by obese men with hypogonadism/low testosterone (low T) improves testosterone levels,” one doctor said. (iStock)
Dr. Anthony Puopolo, men’s health expert and lead medical provider for RexMD, reflected on these findings in an interview with Fox News Digital.
“This provides early evidence that GLP-1 medications taken by obese men with hypogonadism/low testosterone (low T) improves testosterone levels,” he said.
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While more research is necessary, Pupolo, who was not involved in the study, shared his optimism about how GLP-1s can play a role in improving male fertility.
“If this finding continues to gain evidence, GLP-1s might be a better option for low T than testosterone replacement therapy (TRT) in obese men – as GLP-1 medications preserve fertility, whereas TRT tends to be harmful to male reproductive/sperm function,” he added.
Health
Measles-infected traveler may have exposed passengers at LAX and nearby hotel, health officials warn
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A traveler infected with measles may have exposed passengers at Los Angeles International Airport and guests at a nearby hotel after arriving in Los Angeles County earlier this month, health officials said Wednesday.
The Los Angeles County Department of Public Health said it is investigating a confirmed measles case involving a traveler who arrived aboard Cathay Pacific Flight CX 884 on June 11. The traveler was infectious while passing through Los Angeles County, potentially exposing others at LAX and the Hilton Los Angeles Airport Hotel.
The case marks the sixth measles infection reported in Los Angeles County this year. Health officials said the risk of exposure could increase as summer travel ramps up and Los Angeles welcomes international visitors for FIFA World Cup events being held in the region.
MEASLES CASES CONFIRMED AT FOUR MAJOR US AIRPORTS ACROSS COUNTRY AMID PEAK HOLIDAY TRAVEL
A 3D illustration shows measles virus particles. (iStock)
According to health officials, anyone who was at the Tom Bradley International Terminal between 10 a.m. and noon on June 11 may have been exposed. Officials also identified a potential exposure at the Hilton Los Angeles Airport Hotel, located at 5711 W. Century Blvd., between 11:15 a.m. and 12:15 p.m. that same day.
The Centers for Disease Control and Prevention is working with local health departments to notify passengers who were seated near the infected traveler on the international flight.
People who were at either location during the listed times could develop symptoms between seven and 21 days after exposure, officials said. The last day to monitor for symptoms is July 2.
AT LEAST 46 CHILDREN DEAD AMID MEASLES OUTBREAK AS VIRUS SPREADS GLOBALLY
Los Angeles International Airport is seen in Los Angeles, California. Health officials said a traveler infected with measles may have exposed passengers at LAX on June 11. (Michael Yanow/NurPhoto)
“As measles cases increase, it is important that residents take steps to make sure they are fully protected,” Los Angeles County Health Officer Dr. Muntu Davis said. “The MMR vaccine is the safest and most reliable way to prevent measles and protect yourself, your family, and your community.”
Travelers exit a terminal at Los Angeles International Airport in Los Angeles on Monday, March 23, 2026. (Ethan Swope/AP Photo)
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Symptoms include fever, cough, runny nose, red and watery eyes, followed by a rash that typically begins on the face before spreading to the rest of the body.
Fox News Digital reached out to the Los Angeles County Department of Public Health for additional comment but did not receive a response.
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