Health & Medicine

1. Popular brain supplement linked to shorter lifespan in men

   A large study involving more than 270,000 people has linked higher blood levels of the amino acid tyrosine to a shorter lifespan in men. Using both observational data and genetic analysis, researchers found that elevated tyrosine could potentially reduce male life expectancy by nearly a year, while no significant effect appeared in women. Tyrosine is found naturally in protein-rich foods and is also sold as a supplement for boosting focus and mental performance, making the finding especially intriguing.

2. Scientists find breast cancer cells hiding behind protective “shields”

   Researchers have mapped breast tumors in striking detail and uncovered hidden pockets of dormant cancer cells that may help explain why cancer can return after treatment. Unlike rapidly dividing cells, these quiet cells can essentially hibernate, allowing them to evade chemotherapy and reactivate later. The team found that they are often surrounded by immune cells and connective tissue cells that may act like a protective shield.

3. A longer exhale may push your brain toward bolder decisions

   Slow breathing with a prolonged exhale made people more willing to take risks by changing heart activity and increasing the brain’s sensitivity to rewards. The findings suggest that something as simple as controlling your breath can directly influence how you evaluate choices.

4. Scientists reveal the hidden instructions that build the human brain

   UCLA researchers have discovered two powerful influences that help guide how the human brain forms before birth. Radial glia, stem cells responsible for producing much of the cerebral cortex, change their behavior depending on how they process glucose and on physical contact with signals arriving from the thalamus. Those signals can alter which types of neurons are produced, including upper-layer neurons that are especially prominent in humans.

5. Scientists discover a hidden problem with this popular sugar substitute

   Sorbitol, a sugar alcohol commonly used in sugar-free candy, gum, and other low-calorie foods, may not be as harmless as it seems. Researchers at Washington University in St. Louis found that the body can convert sorbitol into a form of fructose in the liver, potentially triggering some of the same harmful metabolic effects linked to fructose.

6. This lifestyle program improved cognition 55% more than basic health advice

   Older adults at risk of dementia improved their memory and thinking after following lifestyle programs combining exercise, healthy eating, cognitive training, and social engagement. Those who received regular coaching and structured support improved substantially more than participants given general health advice.

7. Scientists find a weak spot in one of the deadliest brain cancers

   Researchers may have found a new way to weaken glioblastoma’s defenses against treatment. Blocking a protein called SET prevented tumors from forming in preclinical models, while targeting related proteins made cancer cells more vulnerable to radiation. The strategy works by restoring activity of PP2A, an enzyme that glioblastoma cells appear to suppress. Human testing will be needed to determine whether the approach is safe and effective.

8. Compound in blueberries may help muscle cells burn excess fat

   Scientists in Japan have identified a natural compound found in blueberries, grapes, and other berries that may help muscle cells burn excess fat instead of storing it. The compound, pterostilbene, reduced abnormal fat buildup in cultured mouse muscle cells by boosting fat breakdown and helping stabilize a key protein involved in fatty acid metabolism.

9. Stanford scientists discover a seafood that can reverse signs of aging

   A substance found in edible sea squirts appeared to reverse several signs of aging in older mice. Plasmalogen supplements improved memory and learning, strengthened connections between brain cells, reduced inflammation, and even helped the mice grow thicker, darker hair. Researchers believe the compounds may encourage brain regeneration and protect aging synapses.

10. New injectable treatment helps the brain rebuild after stroke

    Duke researchers developed an injectable scaffold that helped stroke-damaged brains grow new blood vessels, support nerve regrowth, and recover movement in mice. The treatment appears to work partly by recruiting the body’s own immune cells, including neutrophils that may switch from damaging to helpful under the right conditions.

11. Heart disease and kidney disease can fuel each other. New guidelines aim to break the cycle

    Heart disease and chronic kidney disease can accelerate one another, but new guidelines say simple screening and early treatment could substantially reduce the risks. Blood and urine tests, combined with proven heart and kidney therapies, may help catch problems sooner and prevent serious complications.

12. Too much coffee may weaken bones, study finds

    Following nearly 10,000 older women for 10 years, researchers found that tea drinking was associated with slightly higher hip bone density. Moderate coffee consumption did not appear harmful, but drinking more than five cups a day was linked to lower bone density. The findings suggest tea may offer a small bone-health boost, while excessive coffee could carry some drawbacks.

13. Each extra hour of prolonged sitting linked to 9% higher cancer death risk

    Sitting for long, uninterrupted stretches may carry greater health risks than sitting the same amount of time in shorter bouts. Researchers found that each extra hour of prolonged sedentary behavior was associated with a 9% higher risk of cancer death. Breaking up sitting with movement showed the opposite pattern, while replacing an hour of prolonged sitting with light activity was linked to a 12% lower risk.

14. Some joints may be primed for rheumatoid arthritis before birth

    Scientists have found evidence that vulnerability to rheumatoid arthritis may begin before birth. Finger joints commonly affected by the disease develop with different tissue structures and larger populations of specialized fibroblasts than joints that are usually spared. Those cells also respond differently to inflammation, suggesting that the architecture of each joint may help determine where arthritis eventually takes hold.

15. “Broken heart syndrome” can look just like a heart attack. This test can tell them apart

    “Broken heart syndrome” can mimic a heart attack so closely that patients often need invasive testing to tell the difference. Researchers have now developed the BioTAK score, which combines biological sex with blood biomarkers to identify the condition before cardiac catheterization. In a validation study of nearly 1,800 patients, it correctly classified almost 90% of participants.

16. Mindfulness may lower blood pressure in just 8 weeks

    Mindfulness, gratitude, and optimism training may improve blood pressure, inflammation, and other heart-health measures within just eight to 12 weeks. The strongest programs paired daily practice with regular reinforcement, suggesting that improving psychological well-being could become another tool for protecting cardiovascular health.

17. One immune switch may help drive aging across the body

    Aging may be partly fueled by immune cells losing their ability to clear away damaged, inflammation-promoting cells. Blocking a single receptor restored that cleanup process in mice, reducing inflammation and helping their organs, muscles, and memory remain remarkably youthful.

18. Bats carry dangerous viruses without getting sick. This may be why

    Scientists discovered that more than 500 species of vesper bats possess two separate sets of antibody genes, an immune arrangement never before found in mammals. The surprising system could help explain how bats tolerate so many viruses without becoming seriously ill.

19. Scientists find why the liver may not heal even after you stop drinking

    Alcohol-related liver disease may trap damaged liver cells in a regenerative limbo, preventing the organ from rebuilding itself even after drinking stops. Researchers linked the problem to inflammation-driven RNA errors and identified a pathway that could potentially be targeted to restore liver repair.

20. Goodbye CPAP? New sleep apnea pill cuts breathing events by 44%

    A once-nightly pill cut breathing interruptions by about 44% in a major phase 3 sleep apnea trial, while improving oxygen levels and disease severity. By strengthening the muscles that keep the airway open during sleep, AD109 could offer a new option for people unable to tolerate CPAP.

21. ADHD may have a surprising creative advantage

    Some of the attention patterns that make ADHD challenging may also help spark creativity by allowing the brain to explore more ideas and unexpected connections. Researchers think creative activities could potentially channel this “defocused attention” while helping strengthen the brain systems involved in focus and self-control.

22. Alzheimer’s may leave a mark on the brain long before plaques appear

    Brain changes associated with Alzheimer’s may begin at least seven years before amyloid plaques become detectable with current PET scans. Researchers uncovered the signal by tracking healthy older adults with repeated brain imaging over nearly 20 years. The discovery could help scientists identify Alzheimer’s earlier and suggests that important disease processes may start before visible plaque buildup.

23. Scientists find a human-only gene that may help explain our brainpower

    Scientists discovered that human microglia, immune cells that help shape developing brain circuits, can take four to eight years to mature instead of just weeks as they do in mice. The unusually slow process may help explain how the human brain develops its remarkable complexity and cognitive abilities.

24. Popular sweeteners may leave effects that last for generations

    Two widely used zero-calorie sweeteners, sucralose and stevia, may have effects that linger far longer than the sweet taste itself. In mice, researchers found that both sweeteners altered the gut microbiome, reduced beneficial compounds produced by gut bacteria, and changed the activity of genes involved in metabolism and inflammation. Some of those changes were also detected in later generations that had never consumed the sweeteners themselves.

25. HEPA air purifiers may boost brain function after just one month

    Adults aged 40 and older performed about 12% faster on a test of executive function after using a HEPA air purifier at home for one month. The findings suggest that cleaner indoor air could offer a simple way to help protect the brain from the effects of traffic-related pollution.

26. Obesity leaves a lasting memory in immune cells

    Obesity appears to leave a molecular imprint on key immune cells that may persist for 5 to 10 years after weight loss. This long-lasting “obesity memory” could help explain why some obesity-related health risks remain elevated even after body weight returns to normal.

27. Your neighborhood in your 20s may shape your heart decades later

    Where you live in early adulthood may quietly shape your heart health for decades. Researchers found that adverse neighborhood conditions were linked to a higher risk of coronary artery calcification in midlife, an early warning sign of cardiovascular disease.

28. Reaching 90 without dementia doesn’t mean you’re in the clear

    A study of people over 90 found that dementia risk remains strongly shaped by sex, race and genetics, with women and black participants facing notably higher risks. Intriguingly, some people stayed cognitively healthy despite carrying major risk factors, potentially offering clues to how the brain can resist dementia deep into old age.

29. High blood sugar may help cancer cells hide from the immune system

    Researchers discovered a possible way cancer cells hide from the immune system: they build a thick, sugar-rich coating around themselves. High blood sugar can strengthen this protective shield under conditions that resemble the environment inside tumors, with the protein HSF1 playing a key role. Blocking this process could make cancer cells easier for the immune system to recognize and destroy.

30. One injection could keep osteoarthritis drugs working for weeks

    Scientists have created an injectable gel that can remain inside arthritic joints for weeks, slowly releasing medication while also improving lubrication. The approach could make it easier to deliver disease-modifying drugs directly where they are needed while limiting exposure elsewhere in the body.

31. Long-term melatonin use linked to 90% higher heart failure risk

    People with chronic insomnia who used melatonin long term had a roughly 90% higher risk of developing heart failure over five years, according to a large preliminary study. The findings do not prove melatonin causes heart problems, but they raise new questions about the safety of taking the popular sleep supplement for extended periods.

32. Researchers unveil sustainable spirulina solution to vitamin B12 deficiency

    Researchers have produced a form of Spirulina containing biologically active vitamin B12 at levels comparable to beef. By carefully controlling the light used to grow the algae, they overcame a major problem with conventional Spirulina, which mainly contains a form of B12 the human body cannot use. The carbon-neutral system could provide a more sustainable source of the essential vitamin.

33. Common supplements rival antibiotics for severe gum disease

    Omega-3 and low-dose aspirin matched the effectiveness of antibiotics in a year-long study of patients with severe gum disease, with both approaches helping about 58% reach the treatment goal. The unexpected result could point to a new way to treat some patients while reducing reliance on antibiotics and the growing problem of antibiotic resistance.

34. Your waist size may reveal health risks BMI misses

    A simple waist measurement may be nearly as effective as more complicated methods for detecting unhealthy levels of body fat. Researchers also found that BMI alone missed many people with obesity, suggesting waist size could provide an important warning sign.

35. Dogs may hold surprising clues to human longevity

    Dogs and humans may have more in common when it comes to aging than scientists realized. Researchers with the Dog Aging Project found that patterns of small molecules in dogs’ blood were linked to longer or shorter lifespans in remarkably similar ways to those seen in people. These metabolic “fingerprints” could offer clues about the biological processes that drive aging, including metabolism, inflammation, and cellular stress.

36. A cancer therapy put severe rheumatoid arthritis into remission

    CAR T-cell therapy dramatically reduced disease activity in six people with severe rheumatoid arthritis that had resisted other treatments, with three achieving medication-free remission. The treatment may work by clearing out harmful immune cells and effectively rebooting part of the immune system, although much larger studies are still needed.

37. Keto diet cut liver fat by 67% in a clinical trial

    A ketogenic diet outperformed Mediterranean and low-fat diets in several measures of metabolic health during a clinical trial involving people with obesity, prediabetes, and fatty liver disease. All three groups lost about 10% of their body weight, but keto reduced liver fat by 67%, compared with 45% for the other diets. About half of the keto group also no longer qualified as having prediabetes after four to five months.

38. Scientists discover why damaged nerves struggle to heal

    Scientists have identified a protein that acts like a brake on the nervous system’s ability to repair damaged connections. Blocking AHR helped injured nerve fibers regrow and improved movement and sensation in mice with nerve or spinal cord injuries. The discovery could eventually point toward new treatments designed to shift neurons from simply surviving an injury to actively rebuilding themselves.

39. Experimental eye drops help blind mice see again

    Scientists have created light-activated drugs that helped blind mice perceive light again and restored visually guided behavior without gene therapy, implants, or specialized lighting. Even more intriguingly, two of the most promising compounds worked when administered as eye drops, pointing toward a potentially simple new approach to restoring vision.

40. Your sleep may be hiding an early clue to Alzheimer’s

    Frequent micro-awakenings during sleep were linked to higher genetic risk for Alzheimer’s in healthy middle-aged adults who had no symptoms. The discovery raises the possibility that subtle changes during sleep could offer an early warning signal years before memory problems appear.

41. Scientists tested 212 plant-based meat alternatives. Every one contained fungal toxins

    Every one of 212 plant-based meat alternatives and drinks tested in the UK contained at least one naturally occurring fungal toxin, though concentrations remained below recommended EU guideline levels. Researchers say the bigger question is whether regularly eating large amounts of these foods could lead to potentially concerning cumulative exposure over time.

42. A common vape flavoring may disrupt early embryo development

    A popular vanilla flavoring in e-cigarettes may interfere with some of the earliest steps of human development. In lab experiments, vanillin caused embryonic stem cells to lose their ability to develop normally and pushed them toward forming only certain types of tissue.

43. Vitamin C won’t prevent most colds, but it may do one small thing

    The belief that huge doses of vitamin C can ward off colds was popularized more than 50 years ago by Nobel Prize winner Linus Pauling. Since then, larger studies have found that vitamin C does not prevent most people from catching a cold, although regularly taking it may make severe symptoms slightly shorter or milder.

44. Smart nanoparticles light up brain cancer and destroy what surgery misses

    Scientists created smart nanoparticles that can both illuminate hidden glioblastoma cells during surgery and destroy microscopic cancer left behind afterward. In mice, the treatment prevented recurrence and led to 100% survival at 60 days, though it has not yet been tested in humans.

45. Scientists may have found a shortcut to calorie restriction’s anti-aging benefits

    Moderate calorie restriction lowered an immune protein called C3 that appears to help drive chronic inflammation as the body ages. Blocking the same protein reduced age related inflammation in mice, raising the possibility that future treatments could mimic some benefits of calorie restriction without severe dieting.

46. Eating more ultra-processed foods may raise prostate cancer risk by 30%

    Ultra-processed foods make up a huge share of the American diet, and new research suggests they may carry another serious health risk for men. In a nationally representative study of more than 17,000 U.S. men, those who ate more ultra-processed foods, including soft drinks, packaged snacks, cereals, and processed meats, had roughly 24% to 31% higher risks of prostate cancer after accounting for factors such as age, smoking, race and ethnicity, and poverty status.

47. Scientists discover a brain “brake” that can shut down chronic pain

    Researchers discovered a brain-based “brake” that can shut down chronic nerve pain in mice by calming an overactive pain circuit. Targeting this system more precisely could one day lead to powerful pain relief without affecting opioid receptors throughout the entire body.

48. Common medications may change your gut for years

    Common medications may reshape the gut microbiome long after the last dose is taken. In a study of more than 2,500 people, researchers found lasting microbial changes linked not only to antibiotics, but also to antidepressants, beta-blockers, acid-reducing drugs, and benzodiazepines. Some effects were still detectable years later, suggesting past medication use may strongly influence the gut bacteria people carry today.

49. Supercharged “natural killer” cells could be a powerful new cancer weapon

    Researchers have found a way to supercharge natural killer cells, powerful immune cells that can attack cancer, so they can penetrate solid tumors and keep fighting once inside. In mice, these specially prepared tissue-resident cells slowed the growth of several tumors, including melanoma and head and neck cancers, and worked even better when paired with the antibody drug cetuximab.

50. Turmeric compound may protect blood vessels from diabetes damage

    A compound found in turmeric may help protect blood vessels from some of the damage caused by Type 1 diabetes. In rats, curcumin reduced inflammation, improved cellular signaling, and restored vascular health to levels resembling those of nondiabetic animals. The results hint at a possible new way to reduce the long-term cardiovascular risks of diabetes, but human trials are still needed.

51. What you eat before age 2 may affect your health 70 years later

    Britain’s postwar sugar rationing created a rare natural experiment that let researchers examine how early sugar exposure might affect health decades later. People who experienced more rationing during their first 1,000 days had lower rates of several cancers and showed signs of slower biological aging. They were also still eating less sugar and maintaining healthier diets around age 50.

52. Bird flu is spreading. Your backyard feeder could make it worse

    Backyard bird feeders could become unexpected hotspots for H5N1 as Australia’s bird flu outbreak spreads, bringing species together in ways that rarely occur naturally. Experts say stopping feeding is safest, while smaller amounts of food, no hand-feeding, and careful cleaning can reduce the danger.

53. A missing color in indoor light may help prevent myopia

    A wavelength of light largely missing from indoor LEDs may play an important role in protecting developing eyes from nearsightedness. Researchers found that indigo light completely prevented myopia in tree shrews, whose eyes share important similarities with human eyes. The discovery raises the possibility that future indoor lighting could be redesigned to more closely mimic sunlight and potentially reduce childhood myopia.

54. Too much or too little sleep may make your body age faster

    Both too little and too much sleep may be linked to faster aging throughout the body. Researchers analyzing 23 biological aging clocks found the lowest aging levels among people sleeping about 6.4 to 7.8 hours per day. Short or long sleep was also associated with numerous conditions affecting the brain, heart, lungs, metabolism, and digestive system.

55. Childhood trauma may leave a lasting “scar” inside brain cells

    Early-life stress may physically alter how DNA is packaged in the brain, leaving stress-related genes primed to activate more easily years later. In mice, researchers were able to block this effect, preventing the heightened anxiety and stress sensitivity that otherwise appeared in adulthood.

56. Depression may shut down the brain’s ability to make new neurons

    A major study found that adults with depression show disrupted production of new neurons in the hippocampus, potentially weakening the brain’s ability to separate new experiences from painful memories. The researchers also identified broad molecular changes that could open the door to new treatments tailored to different biological forms of depression.

57. Shingles vaccine linked to 24% lower dementia risk

    Older adults who received the Shingrix shingles vaccine were 24% less likely to be diagnosed with dementia over four years in a study of more than 500,000 people. Researchers estimate the difference could amount to roughly one dementia case prevented for every 17 people vaccinated.

58. Your genes may decide whether a low-carb diet sends cholesterol soaring

    A low-carb diet may raise LDL cholesterol much more sharply in people who are genetically predisposed to high cholesterol, particularly when they consume lots of saturated fat. The findings could help explain why people following seemingly similar diets can have dramatically different results.

59. Experimental compound helps burn fat without muscle loss

    A decades-old compound may point to a new way of treating obesity by making the body burn more energy rather than simply reducing appetite. In mice, TOFA increased energy use by as much as 18%, reduced body fat without significant muscle loss, and improved blood sugar, triglycerides, and fatty liver disease. It also produced stronger results when combined with GLP-1 drugs such as Ozempic, Wegovy, Mounjaro, and Zepbound.

60. People who live past 110 have an unusual abundance of killer immune cells

    People who reach 110 and beyond appear to have unusually large numbers of rare immune cells capable of killing abnormal cells. These CD4 cytotoxic T cells became more common with age and often expanded into large groups of nearly identical cells, suggesting the immune system was repeatedly responding to persistent threats.