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الوسم: health risks

  • Your Waistline Could Uncover Secret Health Dangers

    Your Waistline Could Uncover Secret Health Dangers

    A waist measurement with a tape can reveal more about someone’s health than many realize. Recent research from Rutgers Health indicates that simply measuring waist size could be a straightforward and effective way to identify excess body fat and associated health risks. The study, led by Aayush Visaria and published in JAMA Network Open, explored whether multiple body measurements are necessary or if simpler methods could provide similar insights.

    Obesity is commonly understood as having an excess of body fat, but accurately measuring fat in a typical healthcare setting can be challenging. Doctors often use the body mass index (BMI), which compares weight to height, because it’s quick and inexpensive. However, BMI has limitations: it doesn’t specify where fat is stored and can’t distinguish between muscle and fat. As a result, individuals with the same BMI might have very different levels of health risk.

    Fat around the waist, especially visceral fat surrounding internal organs, is particularly concerning. Increased abdominal fat has been linked to higher risks of type 2 diabetes, heart disease, strokes, and other health problems. To compare different methods of identifying obesity, the Rutgers team analyzed data from about 1,900 adults aged 20 to 59, collected through the National Health and Nutrition Examination Survey. This program gathers detailed health and nutrition data from Americans.

    The researchers evaluated several obesity definitions against precise body fat measurements and also tested a newer approach combining multiple measurements, including BMI, waist size, waist-to-height ratio, and waist-to-hip ratio. Although this combined method detected more cases of excess body fat, simpler techniques performed nearly as well in correctly identifying obesity while minimizing false positives.

    Notably, checking either BMI or waist circumference alone was highly effective, with waist measurement by itself performing almost as well. This highlights that a basic tape measure could be surprisingly valuable in everyday health assessments. Since measuring the waist is quick and requires minimal equipment, it’s more practical for routine visits than some other measures like hip circumference, which isn’t typically recorded.

    The study also confirmed that relying solely on BMI can lead to missed diagnoses. Some individuals with significant body fat could have a BMI in the normal range, hiding their true health risk. Changes in clothing fit—like needing to loosen a belt or buy larger pants—can sometimes signal a growing waist and serve as a non-medical early warning that warrants further checking.

    While waist size is a helpful indicator, it doesn’t replace comprehensive health assessments. Blood pressure, blood sugar, cholesterol levels, family history, fitness, and age all play critical roles in evaluating risk for conditions such as diabetes or heart disease.

    The research has limits, including its focus on adults aged 20 to 59, so the findings might not extend perfectly to older populations. Additionally, measurement accuracy and individual health factors vary, meaning no single measure guarantees precise predictions for every person.

    Nevertheless, the findings support reintroducing tape measurements into standard health evaluations. Simpler methods like waist circumference can uncover risks that BMI alone might overlook, offering a low-cost, easy way for early detection of potential health issues. Future studies will help determine how well these strategies predict long-term health outcomes, but combining weight and waist size might enable earlier, more effective interventions to reduce lifelong risks.

  • Pollution’s Role in Increasing Bladder Cancer Severity

    Pollution’s Role in Increasing Bladder Cancer Severity

    Air pollution has traditionally been associated with respiratory and heart diseases, but recent research indicates its harmful effects extend well beyond these areas. Tiny airborne particles known as PM2.5 are small enough to penetrate deep into the lungs, enter the bloodstream, and circulate throughout the body. These particles originate from sources like vehicle emissions, industrial processes, power plants, wildfires, and other combustion-related activities. Because of their minuscule size, individuals often breathe them in without even noticing, yet chronic exposure has been linked to numerous health issues over time.

    A new study conducted by researchers in Taiwan reveals an additional concern: PM2.5 may contribute to making bladder cancer more aggressive. Published in the journal Particle and Fibre Toxicology, the findings offer fresh insights into how pollution can impact organs far from the lungs. The bladder acts as a storage tank for urine prior to elimination, and due to its role in filtering waste from blood, some air pollution chemicals—being water-soluble—can eventually accumulate in urine. This exposes the bladder’s lining to concentrated pollutants for extended periods.

    While scientists have suspected this mechanism for years, the specific effects on bladder cancer cells remained unclear—until now. Laboratory experiments showed that exposure to PM2.5 altered the behavior of bladder cancer cells, causing them to become more aggressive. The pollution triggered a biological process called epithelial-mesenchymal transition (EMT), during which cancer cells lose their adhesion properties, become more adaptable, and gain increased mobility—factors that facilitate invasion into surrounding tissues and metastasis.

    The scientists also identified key signaling pathways activated after pollutant exposure, opening the door for potential interventions. By targeting these biological routes, researchers hope to develop treatments that can inhibit pollution-driven cancer progression—especially important for populations living in areas with poor air quality. The study underscores that environmental pollutants don’t just impair breathing; they can affect organs throughout the body once they enter the bloodstream and are processed by the kidneys. This underscores why improving air quality is crucial for overall health, not just respiratory wellness.

    This research might guide future cancer studies and influence public health policies aimed at reducing pollution exposure. Limiting PM2.5 emissions could decrease the risk not only of cardiovascular and respiratory illnesses but also slow certain types of cancer growth. One of the strengths of this study lies in its attempt to elucidate a specific biological mechanism rather than merely establishing an association. Nonetheless, since much of the work was conducted in laboratory models, further research involving human subjects is necessary to determine the actual risk levels in real-world scenarios.

    Despite these limitations, the evidence suggests that reducing exposure to fine particles should remain a global health priority. The study’s findings are published in Particle and Fibre Toxicology. They are significant because they go beyond statistical correlations to explain how air pollution may directly modify cancer cells, providing a more convincing understanding of the risks involved. However, they do not definitively prove that PM2.5 alone causes bladder cancer or predict individual disease outcomes.

    Larger-scale human studies are still needed to confirm these findings. Even so, this research strongly supports policies aimed at cleaner air and encourages ongoing exploration of treatments that can prevent pollution-related cancer changes. For those interested in related health topics, recent studies suggest that low-carb diets may influence overall cancer risk, while berries could help prevent cancer, diabetes, and obesity. Additionally, emerging evidence indicates that drinking milk might reduce the risks of heart disease and cancer, and vitamin D supplements could potentially lower cancer mortality rates.

    Source: Research team from Taiwan.

  • Vaping Post-Smoking Cessation Could Still Raise Lung Cancer Risk

    Vaping Post-Smoking Cessation Could Still Raise Lung Cancer Risk

    Millions of individuals worldwide have recently turned to e-cigarettes. Many smokers view vaping as either a stepping stone to quitting traditional cigarettes or as a safer, long-term alternative. Unlike conventional cigarettes, e-cigarettes don’t burn tobacco; instead, they heat a liquid that users inhale as vapor. Since there’s no smoke involved, vaping is often promoted as a much less harmful option.

    This appeal has drawn smokers looking to improve their health without giving up nicotine entirely. Some public health discussions in certain countries have even supported e-cigarettes as a tool to help smokers quit. However, scientists consistently warn that just because something is less harmful doesn’t mean it’s harmless.

    A new study published in Nature Medicine indicates that former smokers who switch to e-cigarettes may still face a significantly increased risk of lung cancer compared to individuals who quit smoking altogether. Lung cancer remains the leading cause of cancer-related deaths globally, claiming more lives than any other cancer type and often being diagnosed late when the disease has already progressed.

    Smoking is the most avoidable cause of lung cancer, making quitting one of the most effective ways to lower risk. However, because lung cancer develops slowly—taking years or even decades to manifest—it’s challenging to assess the long-term effects of newer products like e-cigarettes. Prior research mainly addressed short-term symptoms, such as sore throats, coughing, and breathing difficulties. To truly understand the potential long-term risks, large-scale, long-duration studies are necessary.

    Researchers in South Korea utilized one of the world’s largest health databases, analyzing data from the National Health Screening Program that included over 4.5 million people. They compared three groups: ongoing smokers, individuals who quit smoking entirely, and those who switched to e-cigarettes after quitting traditional cigarettes.

    The results showed a clear trend: those who never smoked had the lowest lung cancer risk. Former smokers who transitioned to e-cigarettes, however, faced a notably higher risk of developing lung cancer and dying from it. Specifically, compared to those who quit smoking completely, e-cigarette users had a 56% higher chance of developing lung cancer and were twice as likely to die from it.

    While switching to vaping was associated with better outcomes than continuing to smoke, it didn’t match the protection provided by complete nicotine abstinence. The study also found that the benefits of remaining smoke-free diminish over time among vapers. After five or more years without smoking, e-cigarette users still exhibited significantly higher risks of lung cancer compared to those who never vaped.

    Among adults aged 50 to 80, these findings are especially concerning. Vaping was linked to a 91% increase in lung cancer risk and a 92% higher chance of dying from the disease. Scientists highlight that e-cigarettes are not chemically inert. Research has detected numerous potentially hazardous substances in vaping products, including carcinogens and toxic metals such as lead, nickel, and chromium. Repeated exposure to these substances could gradually damage lung tissue over many years.

    The authors note that their study cannot definitively prove that e-cigarettes cause lung cancer, but the data strongly imply that vaping may hamper significant health gains achieved through smoking cessation. This raises a crucial public health question: while e-cigarettes may be safer than smoking for some users, are they safe enough to serve as a permanent replacement?

    The evidence suggests that for those aiming to reduce their lung cancer risk, complete cessation of smoking and long-term avoidance of e-cigarettes offers the greatest health benefits. As more long-term research emerges, healthcare professionals and policymakers may need to revisit how vaping is recommended and framed for those seeking a healthier future.

    For additional insights, consider studies indicating that a low-carb diet might increase overall cancer risk or explore new strategies to improve longevity among cancer survivors. You can also find information on anti-cancer superfoods and evidence suggesting daily vitamin D3 supplementation could lower the risk of cancer-related death.

    Source: Study published in Nature Medicine, utilizing data from South Korea’s National Health Screening Program.

  • Large Study Finds E-Cigarettes Increase Lung Cancer Risk

    Large Study Finds E-Cigarettes Increase Lung Cancer Risk

    Credit: Unsplash+

    For years, electronic cigarettes and vaporizers have been marketed as safer alternatives to traditional cigarettes. Without burning tobacco, many believed they posed less health risk than smoking. Their colorful flavors, sleek designs, and aggressive advertising reinforced the idea that vaping was a healthier choice.

    Some health experts even argued that e-cigarettes could help smokers quit and lower their chances of developing smoking-related diseases. Quitting smoking remains one of the best steps to improve health — reducing risks of heart disease, stroke, and various cancers. The longer someone stays off cigarettes, the more their health benefits grow. However, increasing concerns have emerged about whether replacing cigarettes with e-cigarettes is truly safe.

    A recent study published in Nature Medicine adds to these worries. Researchers analyzed health data from over 4.5 million individuals in South Korea to examine if using e-cigarettes after quitting smoking impacts the likelihood of developing lung cancer and dying from it.

    Lung cancer remains one of the deadliest forms globally, with approximately 2.5 million new cases and 1.8 million deaths reported in 2022. Smoking is the leading preventable cause of lung cancer, with risk levels rising the longer and more heavily a person smokes.

    Because lung cancer typically develops over decades, understanding the long-term effects of vaping has been challenging. Most previous research focused on short-term issues like cough, sore throat, and breathing problems. Larger, long-term studies are needed to determine if vaping modifies the risk of serious diseases like cancer.

    The study utilized data from South Korea’s National Health Screening Program, involving nearly 4.5 million participants. Researchers tracked smoking and vaping habits over several years and categorized individuals into groups such as current smokers, those who quit briefly, and those who quit long-term. Particular attention was paid to adults aged 50 to 80, who are at higher risk for lung cancer.

    The results were striking. Those who completely stopped smoking had the lowest risk of developing lung cancer and dying from it. Conversely, former smokers who switched to e-cigarettes faced significantly higher risks. Compared to those who quit entirely, e-cigarette users had a 56% greater chance of developing lung cancer and were twice as likely to die from it.

    The study also indicated that vaping might hinder the health benefits gained from quitting smoking. Long-term quitters who abstained from cigarettes for at least five years still faced an elevated lung cancer risk if they used e-cigarettes. Even those who quit smoking less than five years ago saw some protective benefits diminish if they switched to vaping.

    The findings were especially alarming among adults aged 50 to 80. In this group, e-cigarette use was associated with a 91% higher chance of developing lung cancer and a 92% higher risk of death from it, compared to individuals who completely ceased nicotine use.

    Experts warn that e-cigarettes are not risk-free. While they don’t involve burning tobacco, they can still expose users to harmful substances. Studies have detected carcinogenic chemicals like formaldehyde, alongside toxic metals such as lead, nickel, and chromium, in some vaping products. These substances could contribute to long-term damage to the lungs and other organs.

    Although the study does not definitively prove that vaping causes lung cancer, the strong association suggests that using e-cigarettes after quitting smoking may undermine some of the health benefits of abstaining from tobacco.

    These findings challenge the common perception that e-cigarettes are completely harmless substitutes for traditional cigarettes. While vaping may be less damaging than smoking, the best health outcomes are associated with quitting all nicotine products entirely.

    The large scale and extended follow-up of this research highlight the potential serious risks linked to vaping that are only beginning to be understood. Recognizing these risks, healthcare providers and public health officials might need to revisit how they advise smokers and former smokers about e-cigarette use.

    If you’re interested in cancer prevention, consider exploring studies showing that a low-carb diet could raise overall cancer risk and that berries may help prevent cancer, diabetes, and obesity.

    Additional health insights include recent findings on how milk consumption influences heart disease and cancer risk, as well as evidence that vitamin D supplements could significantly lower cancer mortality rates.

  • Most Americans Tested Have ‘Forever Chemicals’ in Their Blood

    Most Americans Tested Have ‘Forever Chemicals’ in Their Blood

    A recent extensive study has revealed that almost every blood sample tested contained PFAS, a group of chemicals commonly referred to as “forever chemicals” because they linger in the environment and human bodies for extremely long periods.

    The research analyzed over 10,500 blood samples, finding PFAS in 98.8% of them. Experts say these results highlight how pervasive these chemicals have become in daily life.

    Published in the Journal of Occupational and Environmental Hygiene, this study is among the largest investigations on PFAS levels in humans to date.

    PFAS, short for per- and polyfluoroalkyl substances, are a broad family of man-made chemicals that have been used for decades to make products resistant to water, grease, stains, and high heat.

    These chemicals are present in many common items, including nonstick cookware, waterproof jackets, food wrappers, carpets, furniture, cosmetics, electronics, and firefighting foams. Because PFAS break down very slowly, they can remain in water, soil, and living organisms for many years.

    Scientists now believe PFAS contamination is nearly everywhere in the modern world. They have been detected in rivers, oceans, rainwater, wildlife, food, and even in remote regions far from urban areas or industrial sites.

    This new study reinforces the idea that exposure to PFAS is now almost unavoidable for many individuals.

    Most people carry multiple PFAS chemicals simultaneously, with about 98.5% of samples showing several chemicals together. This is significant because there is growing concern that mixtures of chemicals may affect the human body differently and potentially more severely than single chemicals.

    Many prior studies have focused on individual PFAS compounds, but real-life exposure often involves a combination of many. Researchers found dozens of different PFAS mixtures, with the most common containing five different chemicals, present in over 2,700 samples.

    Some of the most frequently detected chemicals include PFOS and PFOA, which were heavily used for years before safety concerns arose.

    Previous research links certain PFAS chemicals to serious health issues like cancer, infertility, thyroid problems, liver damage, weakened immune response, high cholesterol, and developmental issues in children.

    One chemical frequently identified, perfluorohexane sulfonic acid, has been associated with potential effects on immune function, liver health, and thyroid activity.

    Despite knowing some PFAS can be harmful, significant gaps remain because roughly 10,000 variants exist, most of which lack comprehensive study.

    Blood samples for this research were collected through NMS Labs, a leading independent testing laboratory in the U.S. They tested most samples for 13 PFAS chemicals, with some screened for as many as 18.

    Lead researcher Dr. Laura Labay explained that this study offers valuable insight into actual human exposure patterns. Understanding which PFAS combinations often appear together can help scientists better assess health risks and develop improved public health guidelines.

    The study also suggests that current exposure levels might be underestimated, as not all PFAS variants were tested.

    Over recent years, global concern about PFAS has surged. Contamination has been found in drinking water supplies near military bases, airports, factories, and industrial sites, locations heavily involved in firefighting foam and chemical manufacturing.

    Governments worldwide face increasing pressure to tighten regulations and remediate contaminated sites. Some PFAS chemicals have already been restricted or phased out in certain countries, yet many replacement chemicals are still in widespread use.

    One challenge with PFAS is their practical application; their unique chemical properties—resisting heat and water—have made them valuable to industry for a long time.

    Health experts say it may be impossible to eliminate personal exposure entirely because these chemicals are so widespread. However, steps like using water filters designed to remove PFAS, avoiding unnecessary stain- and water-resistant products, and limiting consumption of heavily packaged foods could help reduce individual exposure.

    The findings underscore the urgent need for more research into the combined effects of multiple PFAS chemicals over time, especially since environmental contamination can silently spread into daily life over decades.

    Future studies are needed to identify which PFAS mixtures pose the greatest health risks and whether long-term exposure to multiple chemicals increases disease likelihood.

    While the study does not establish causation, it strengthens the case that widespread PFAS exposure is a looming public health challenge. It also highlights the importance of stricter regulations and further scientific investigation to fully understand and mitigate associated risks.

  • Top Benefits and Risks of Popular Weight Loss Drugs to Know

    Top Benefits and Risks of Popular Weight Loss Drugs to Know

    Drugs called GLP-1 receptor agonists have recently gained traction, not only for managing diabetes but also for aiding weight loss. However, a new comprehensive review suggests that while these medications offer notable benefits, they also carry significant risks that individuals should be aware of.

    Published in JAMA Network Open, the study analyzed an extensive pool of data to better understand the effects of these drugs beyond their primary purposes. Researchers examined 60 previous reviews, which encompassed over 1,700 clinical trials and more than 3.5 million participants. This large dataset lends considerable strength to the findings.

    GLP-1 medications mimic a hormone naturally produced in the body, released after eating, which helps regulate blood sugar and appetite. They work by slowing stomach emptying, leading to longer-lasting feelings of fullness, and stimulate insulin release when necessary. This dual action makes them effective tools for controlling diabetes and supporting weight loss endeavors.

    Despite their benefits, the review identified a strong link between GLP-1 drugs and gastrointestinal side effects. Many users experience nausea, vomiting, or diarrhea, which can be uncomfortable and sometimes lead to discontinuation of the medication.

    Interestingly, the study also highlighted some potential unexpected advantages. These drugs might offer protection against certain infections and could help improve lung health by reducing airway inflammation. Additionally, weight loss caused by these medications may alleviate conditions like sleep apnea.

    There’s emerging evidence suggesting that GLP-1 drugs could benefit brain health, possibly lowering dementia risk by enhancing blood flow and reducing harmful substances in the brain. Early signs also indicate they might support bone health and decrease fracture risk. Nonetheless, the researchers emphasize that these potential benefits are still preliminary and require further investigation for confirmation.

    The focus of this study was on effects beyond the standard benefits related to blood glucose, cardiovascular health, and kidney function, which have been extensively studied before. Combining results from numerous trials helps offer a clearer picture of both the risks and the broader health implications of these medications.

    However, some limitations exist. Variations in how individual studies were conducted may influence the results. Additionally, some claimed benefits are based on indirect evidence and need more robust validation.

    Ultimately, GLP-1 medications remain a valuable option for diabetes management and weight loss support. Patients and healthcare providers should be mindful of common digestive side effects, while also noting that the potential for additional health benefits is still being explored and not yet definitively proven.

    As the use of these drugs continues to expand, ongoing research will be essential to understand their long-term impacts fully. For those interested in weight loss, recent studies suggest that hop extract may help reduce belly fat in overweight individuals, and early-time-restricted eating could be effective for losing weight.

    For further health insights, consider reviewing recent research on simple weight loss strategies and non-invasive treatments for obesity and diabetes.

    Source: JAMA Network Open.

  • Delhi’s Toxic Air Forcing Pollution Refugees to Flee India

    Delhi’s Toxic Air Forcing Pollution Refugees to Flee India

    Commuters navigate dense smog in New Delhi on November 13, 2024. — AFP

    • Families are leaving Delhi due to health concerns from air pollution.
    • PM2.5 levels, which can cause cancer, have increased by 60 times the WHO recommended limits.
    • A study links 3.8 million deaths in India from 2009 to 2019 to air pollution.

    BENGALURU: Pollution levels in India’s capital influenced Natasha Uppal and her husband’s choice about having children — whether to raise their child away from the city or remain childless.

    New Delhi and its metro area, home to over 30 million residents, routinely ranks among the world’s most polluted cities.

    Uppal, a lifelong resident, often thought about relocating — especially on days when indoor air purifiers hummed and she suffered from severe migraines.

    The decision became clearer when they decided to try for a baby.

    “When we considered what kind of environment we could offer our child in Delhi,” she shared with AFP, “the air pollution presented a major obstacle to many of those aspirations.”

    In 2022, they moved to Bengaluru, and shortly after, Uppal found out she was pregnant.

    Natasha Uppal (right), a pollution refugee and founder of maternal health support group Matrescence India, arranging plant pots with her husband Nikhil at their terrace garden in Bengaluru on September 27, 2025. — AFP
    Natasha Uppal (right), a pollution refugee and founder of Matrescence India, arranging plants with her husband Nikhil on their terrace in Bengaluru, September 27, 2025. — AFP

    They are among a growing number of families leaving Delhi due to health issues caused by air pollution.

    Uppal, who is 36 and leads the maternal health group Matrescence India, considers relocating the “best decision.”

    Bengaluru’s air pollution sometimes peaks at three times the WHO limit but remains well below Delhi’s persistent haze — enabling her son to go outside as often as he wishes.

    “Clean air is a fundamental human right,” she emphasized. “Everyone should be able to take it for granted.”

    3.8 million deaths

    Each winter, Delhi is engulfed in a thick, toxic smog, a mix of crop-burning fumes, factory emissions, and heavy traffic.

    PM2.5 particles — tiny, cancer-causing particles that can enter the bloodstream — have soared to 60 times the limits recommended by the WHO.

    Despite commitments to improve air quality, measures like partial vehicle bans or mist-spraying water trucks have made little difference.

    This year, officials have announced plans for cloud seeding trials to reduce pollution.

    A recent study published in The Lancet Planetary Health estimated that 3.8 million deaths in India between 2009 and 2019 were linked to air pollution.

    Vidushi Malhotra, a pollution refugee and founder of an education advisory organization, reading a children's book to her son at their home in Goa on September 27, 2025. — AFP
    Vidushi Malhotra, a pollution refugee and founder of an education organization, reading to her son in Goa, September 27, 2025. — AFP

    The UN children’s agency warns that polluted air greatly increases the risk of respiratory infections among children.

    For Vidushi Malhotra, 36, her breaking point came in 2020 as her two-year-old son repeatedly fell ill.

    “We had three air purifiers running nonstop, and still needed more,” she recalled.

    By the following year, Malhotra, her husband, and their son moved to Goa. She began encouraging others to follow her lead, sparking what she calls a “mini-movement.” A few friends did.

    “It’s heartbreaking to watch my loved ones struggle with this,” she said. “That truly saddens me.”

    Nebulizers, inhalers

    Meanwhile, Delhi resident Roli Shrivastava remains in the city but lives with constant worry.

    The 34-year-old keeps inhalers for her allergy to smoke and nebulizers on hand for her toddler, whose cough worsens every winter.

    “Doctors told us winter will be tough,” she explained. “They just said, ‘When your kid starts coughing at night, start nebulizing immediately — don’t even call us.’

    As colder weather approaches, Shrivastava is preparing to spend more time indoors, limit outdoor activities for her son, and monitor air quality daily.

    Whenever her family visits Chennai, her son’s health noticeably improves.

    “His runny nose clears, and his cough disappears,” she said.

    Both she and her husband, who work with a global advocacy organization, admit they would have left Delhi long ago if they could find better job opportunities elsewhere.

    Relocating is always on their minds.

    “Given the current trajectory, Delhi no longer feels like a suitable place to raise children — at least in terms of air quality.”