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Your sweat could hold secrets about your health, researchers say — here’s how

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Your sweat could hold secrets about your health, researchers say — here’s how

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New technology could make it significantly easier to monitor patients’ vital health signs.

Engineers at the University of California San Diego have developed an electronic finger wrap that monitors important chemical levels — such as glucose, vitamins and even drugs — using only human sweat, the university stated in a news release.

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The wearable innovation is said to be as easy as wearing an adhesive bandage.

The research was published on Sept. 3 in the journal Nature Electronics.

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“This is the first demonstration of a complete zero-electric powered sweat (extraction and sensing) platform that enables non-invasive monitoring of multiple biomarkers to support a wide range of practical scenarios in personalized health care monitoring and wellness management,” Dr. Joseph Wang, PhD, a professor in the Aiiso Yufeng Li Family Department of Chemical and Nano Engineering at UC San Diego, told Fox News Digital in an email.

New technology from the University of California San Diego, pictured here, could make it significantly easier to monitor patients’ vital health signs. (Shichao Ding)

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The wearable apparatus wraps snugly around the finger and draws its power from the fingertip’s sweat, according to the researchers. 

“Fingertips, despite their small size, are among the body’s most prolific sweat producers, each packed with over 1,000 sweat glands,” the news release stated.

The device is constructed from electronic components and printed on a thin, flexible and stretchable polymer material. 

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It conforms to the finger and is “durable enough to withstand repeated bending, stretching and movement,” the researchers stated. 

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Added Wang, “It is based on a remarkable integration of energy harvesting and storage components, with multiple biosensors in a fluidic microchannel, along with the corresponding electronic controller, all at the fingertip.”

Health at your fingertips — literally

In the study trials, the finger wrap showed to be effective, according to the research team.

“The fingertip-wearable microgrid works automatically after it is worn on the finger,” study co-first author Shichao Ding, Ph.D., a postdoctoral researcher in Wang’s research group at the UC San Diego Jacobs School of Engineering, told Fox News Digital via email.

The wearable apparatus wraps snugly around the finger and draws its power from the fingertip’s sweat, according to the researchers.  (iStock)

Participants wore the device on the fingertip while performing daily activities such as working at a desk, walking, eating and sleeping to assess “the real-time performance of the sensors and energy-harvesting system.”

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Biomarker levels can be automatically monitored from the sweat for on-demand health tracking, Ding added.

Fingertip glands can produce 100 to 1,000 times more sweat than most other areas of the body, even during rest, according to the researchers.  

“Fingertips are among the body’s most prolific sweat producers, each packed with over 1,000 sweat glands.”

“This constant trickle of natural perspiration — without any stimuli or physical activity — offers a reliable energy source, fueling the device even during periods of inactivity or sleep,” they stated.

Ding added, “Autonomous power, sensing and treatment all in one device — that’s the ultimate goal.”

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Next steps

Looking ahead, the researchers plan to enhance the device’s performance with additional energy-harvesting techniques.

Those might involve generating mechanical energy from human motion, such as common finger movements like tapping or typing, Ding said.

“In the case of diabetes, such a device could continuously monitor glucose levels, automatically deliver insulin as needed, and then assess the treatment’s effectiveness by further monitoring biomarker levels,” a researcher said. (iStock)

The researchers are working to optimize the circuit design, battery, low-power sensing modules and data transmission to improve the device’s lifespan, stability and functionality, the researcher said, which will help to ensure a sustained balance between energy generation and consumption. 

     

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“Researchers are working to develop a closed-loop system that not only monitors biomarkers, but also administers treatments based on the collected data,” Ding told Fox News Digital.

“For instance, in the case of diabetes, such a device could continuously monitor glucose levels, automatically deliver insulin as needed, and then assess the treatment’s effectiveness by further monitoring biomarker levels.”

A ‘pioneering’ innovation

Seokheun “Sean” Choi, PhD, a professor in the electrical and computer engineering department at Binghamton University in New York, was not involved in the device’s development but commented on its potential.

Wearable technology has made significant strides, noted Choi, who specializes in developing biosensing and bioenergy technologies, including self-powered biosensors and other solutions for personalized health monitoring.

The finger-wrap is “revolutionary” in terms of simple power generation and health monitoring, a doctor confirmed.  (iStock)

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“However, achieving true energy independence — where devices are standalone and always-on — remains a major challenge,” he told Fox News Digital.

Current wearables rely on batteries or other energy storage devices, noted Choi, which pose limitations “due to their bulk and limited energy capacity.”

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The finger-wrap is “revolutionary” in terms of simple power generation and health monitoring, he confirmed. 

“To realize the next generation of wearable applications, power autonomy is essential, allowing devices to operate continuously, independently and self-sustainably,” Choi said.  

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“Autonomous power, sensing and treatment all in one device — that’s the ultimate goal.”

“Professor Wang’s group has pioneered the integration of a sweat-driven electrochemical fuel cell with an energy storage battery, achieving sustainable high performance by using fingertip perspiration to generate meaningful power,” he went on.

“This is revolutionary because sweat was non-invasively and practically harvested from the fingertip in a simple, straightforward manner,” an expert said. (iStock)

“This is revolutionary because sweat was non-invasively and practically harvested from the fingertip in a simple, straightforward manner.”

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In addition to monitoring metabolic functions, Choi said, this solution also has the potential to be used for a wide range of medical applications.

Health

How much red meat is too much? Experts weigh in on food pyramid updates

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How much red meat is too much? Experts weigh in on food pyramid updates

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The release of an updated food pyramid this week has sparked mixed reactions from doctors and dietitians.

One of the most noteworthy shifts in the 2025-2030 Dietary Guidelines for Americans — announced by HHS officials during a Jan. 7 press conference at the White House — is a greater emphasis on “high-quality proteins,” including red meat and eggs, as well as full-fat dairy.

The new guidelines focus on “real, whole, nutrient-dense foods,” and a dramatic reduction in highly processed foods, added sugars, refined carbohydrates and unhealthy fats.

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“Protein and healthy fats are essential and were wrongly discouraged in prior dietary guidelines,” Health Secretary Robert F. Kennedy Jr. said during the press conference. “We are ending the war on saturated fats.”

Nick Norwitz, a Harvard- and Oxford-trained researcher known for his work in metabolic health, shared his reaction to the new guidelines.

The release of an updated food pyramid this week has sparked mixed reactions from doctors and dietitians. (realfood.gov)

Despite how the new pyramid is presented, he noted, the actual guidelines for saturated fat consumption haven’t changed, as they still state that, “in general, saturated fat consumption should not exceed 10% of total daily calories.”

The intake of unprocessed whole foods rich in saturated fat, especially dairy fat, tends to be associated with improved health outcomes, according to Norwitz.

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“Full-fat dairy — especially cheese, for example — tends to be associated with lower BMI, reduced rates of diabetes and even reduced dementia risk,” he told Fox News Digital. “There are, of course, nuances — but ‘ending the war’ on saturated fat seems reasonable.”

Risks vary, experts say

Experts cautioned about the potential health risks of exceeding the recommended intake of saturated fat, including higher rates of LDL “bad” cholesterol, which is known to increase the risk of cardiovascular disease.

“The recommendation to limit saturated fat to 10% of total calories is based on the research showing that higher rates increase LDL cholesterol and associated risks for cardiovascular disease,” Sherry Coleman Collins, a food allergy dietitian and expert from the Atlanta metropolitan area, told Fox News Digital. 

One of the most noteworthy shifts in the 2025-2030 Dietary Guidelines for Americans is a greater emphasis on “high-quality proteins” — including red meat and eggs — as well as full-fat dairy. (iStock)

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Nutrition should be personalized and is dependent on multiple factors, she said, including age, gender, activity level and genetic risk factors.

“The total saturated fat an individual might safely consume is influenced by their size and total calorie needs, as well as potentially genetic differences,” Coleman Collins said.

Norwitz agreed, adding that “the specific food source and interaction with the unique host and their broader dietary context should take the spotlight.”

Dr. Pooja Gidwani, a double board-certified doctor of internal medicine and obesity medicine in Los Angeles, pointed out that not everyone has the same “tolerance” for saturated fats.

“If increasing saturated fat leads to a meaningful rise in LDL cholesterol or ApoB (Apolipoprotein B, a protein found on the surface of certain cholesterol-carrying particles in the blood), that intake level is excessive for that individual, regardless of improvements in weight or glucose metrics,” she said.

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“This personalized approach becomes increasingly important in midlife and beyond, when cardiovascular disease becomes the dominant driver of morbidity and mortality and when tolerance for cumulative atherogenic (artery-clogging) exposure is lower.”

For those who need to reduce LDL cholesterol or have a higher cardiovascular risk, the American Heart Association recommends an even lower amount of saturated fats — less than 6% of total daily calories.

Experts cautioned about the potential health risks of exceeding the recommended intake of saturated fat, including higher rates of LDL “bad” cholesterol. (iStock)

Gidwani also cautioned that diets emphasizing saturated fat could crowd out fiber and unsaturated fats, “both of which play independent roles in cholesterol clearance, insulin sensitivity, gut health and inflammation.”

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“Saturated fat-heavy patterns are also calorie-dense, which can quietly undermine long-term weight management if intake is not carefully regulated,” she added.

Not all saturated fats are equal, experts say

The effects of saturated fat depend on what specific foods are being consumed, according to experts.

“I would recommend choosing minimally processed or unprocessed forms of foods,” said Tanya Freirich, a registered dietitian nutritionist in Charlotte, North Carolina. “For example, in place of a hot dog — which has additives, nitrites, sodium and fillers — consuming a chicken thigh would be a much better choice.”

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Gidwani reiterated that the amount of processing plays a big role.

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“Processed meats are consistently associated with worse cardiometabolic outcomes and represent the clearest category to limit,” she said. “The risk here is not only saturated fat, but also sodium load, preservatives and the broader dietary pattern they tend to accompany.”

“Full-fat dairy — especially cheese, for example — tends to be associated with lower BMI, reduced rates of diabetes and even reduced dementia risk,” an expert told Fox News Digital. (iStock)

Unprocessed red meat, the doctor said, can fit into an overall healthy diet in smaller amounts, particularly when consumed alongside fiber-rich plants and minimally processed foods.

“However, from a longevity perspective, it should be viewed as optional rather than foundational, especially for individuals with elevated cardiovascular risk,” she added.

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When it comes to dairy, Gidwani noted that fermented options are “metabolically more favorable” than butter or cream.

“However, saturated fat from dairy is still not necessary to prioritize for metabolic health or longevity,” she said. “Excessive reliance on dairy fat can displace healthier fat sources without offering clear long-term benefit.”

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Overall, the doctor recommends unsaturated fat sources, including extra virgin olive oil, nuts, seeds, avocado and omega-3-rich fish, as primary dietary fats.

“These consistently support lipid profiles, insulin sensitivity and vascular health,” Gidwani said. “Saturated fat can exist within a balanced diet, but it should remain secondary rather than emphasized.”

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Why the big picture matters

Saturated fat is just one piece of a much wider nutrition puzzle, the experts agreed.

Unprocessed red meat can fit into an overall healthy diet in smaller amounts, particularly when consumed alongside fiber-rich plants and minimally processed foods, one expert said. (iStock)

“Our heart health is not determined by one type of fat or one type of cholesterol, but the sum of many parts — our entire diet, our exercise habits, our stress and so much more,” Freirich said.

She recommends consulting a registered dietitian for guidance on unique dietary needs based on age, gender, activity level and medical history.

“Our heart health is not determined by one type of fat or one type of cholesterol, but the sum of many parts — our entire diet, our exercise habits, our stress and so much more,” said an expert.  (iStock)

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New Jersey-based dietitian Erin Palinski-Wade, author of “2-Day Diabetes Diet,” added that the message should be to focus more on overall patterns.

That means “plenty of fiber-rich plants, lean protein at every meal (including those that also contain fiber, such as nuts and seeds) and a reduction in overall intake of added sugars.”

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“That change will drive true health improvements,” she said.

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The Wegovy Pill Is Here: See the Cost and How Much Weight You Can Lose

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The Wegovy Pill Is Here: See the Cost and How Much Weight You Can Lose


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Missing sleep may take a hidden toll on your brain and longevity, research reveals

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Missing sleep may take a hidden toll on your brain and longevity, research reveals

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Missing out on adequate sleep could be taking years off your life.

New research from the Oregon Health & Science University (OHSU), published in the journal Sleep Advances, found that poor sleep may shorten life expectancy more than other lifestyle factors like diet, exercise and loneliness.

The researchers analyzed nationwide CDC survey data, identifying trends associated with average life expectancy by county, according to a press release.

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The study found that lack of adequate sleep led to higher mortality risk in every U.S. state and was the top behavioral driver compared to other factors, only behind smoking.

Senior study author Andrew McHill, Ph.D., associate professor and director of the Sleep, Chronobiology, and Health Laboratory in the OHSU School of Nursing, noted in a statement that he did not expect sleep to be “so strongly correlated” to life expectancy.

Poor sleep is directly correlated with shorter life expectancy, the study reveals. (iStock)

“We’ve always thought sleep is important, but this research really drives that point home: People really should strive to get seven to nine hours of sleep, if at all possible,” he said.

“This research shows that we need to prioritize sleep at least as much as we do [in] what we eat or how we exercise.”

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In a previous interview with Fox News Digital, Dr. Daniel Amen, psychiatrist and owner of Amen Clinics in California, emphasized how important sleep is for brain function and longevity.

Researchers suggest people should prioritize sleep just as much as diet and exercise. (iStock)

“Sleep is so important,” he said. “When you sleep, your brain cleans and washes itself. And if you don’t sleep seven to nine hours at night, your brain looks older than you are — there’s less blood flow, and it increases inflammation in the brain.”

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“Your brain doesn’t have enough time to get rid of the toxins that build up during the day.”

Lack of adequate sleep can lead to poor decisions and foster toxic cycles, the doctor warned. 

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“If your brain has less activity in the front part, not only are you tired, but you’re also hungrier, and you’re more likely to not make the best decisions,” he said. 

“Which, of course, will stress you out, and then you won’t sleep well the next night.”

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A doctor suggests being “purposeful” about going to bed and waking up each day. (iStock)

One small change to promote longevity and brain health is to try getting to bed 15 minutes earlier, Amen suggested.

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“Really be purposeful about not being distracted by Netflix or your phone,” he said.

“And when you get up in the morning, say to yourself, ‘Today is going to be a great day.’ The more positive you are, the better your brain.”

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