Health & Medicine

1. Ancient DNA reveals plague was already killing humans 5,500 years ago

   Plague was already a deadly killer 5,500 years ago, long before cities, farming, or the rat-infested conditions usually linked to historic outbreaks. By analyzing ancient DNA from hunter-gatherer cemeteries in Siberia, researchers discovered early plague strains in nearly 40% of the individuals studied and found evidence of rapid family-based outbreaks that wiped out many children and young teenagers.

2. Humans may have hidden regenerative powers

   Scientists have taken a surprising step toward unlocking regeneration in mammals, showing that the ability to rebuild complex body parts may not be lost after all—it may simply be switched off. Using a two-stage treatment, researchers redirected the body’s normal healing response away from scar formation and toward regrowth, successfully restoring bone, joints, ligaments, and tendons after amputation in animal studies.

3. Researchers found 8 common food additives linked to high blood pressure and heart disease

   A major study of more than 112,000 people found that eating foods containing common preservatives may be linked to a higher risk of high blood pressure and heart-related diseases. Researchers tracked participants for up to eight years and discovered that people consuming the highest amounts of certain preservatives had significantly greater risks of hypertension, heart attack, stroke, and other cardiovascular problems.

4. A surprising discovery reveals the kidney has a secret backup system

   Scientists at Mayo Clinic have uncovered a surprising new way the kidneys conserve water, revealing a hidden backup system that works independently of the hormone long believed to control the process. The discovery emerged when researchers testing an old drug called probenecid expected it to worsen polycystic kidney disease (PKD) but found it actually slowed cyst growth instead.

5. Ozempic and Wegovy linked to surprising drop in violent behavior

   A Rutgers study suggests GLP-1 drugs such as Ozempic and Wegovy may weaken the link between impulsive tendencies and violent behavior. The surprising finding hints that these medications could affect how people act on impulses, though researchers stress that cause and effect have not been proven.

6. A daily probiotic may help relieve depression and anxiety

   A small clinical trial suggests that probiotics may offer a surprising mental health boost for older adults with depression. Seniors who took a daily probiotic alongside their regular antidepressant treatment experienced slightly greater improvements in depression and anxiety symptoms than those who received a placebo.

7. 10 surprising ways diabetes and dementia are connected

   Diabetes and dementia appear to be closely intertwined, with each condition potentially influencing the other. Problems with insulin and glucose can affect the brain’s energy supply, increase inflammation, and damage blood vessels linked to memory loss. Researchers are also finding that some popular diabetes medications may lower dementia risk. These discoveries are opening new possibilities for protecting brain health as people age.

8. Common plastic chemical linked to lifelong anxiety in new study

   Exposure to a common plastic chemical before and shortly after birth may have lasting effects on behavior. Researchers found that male rats exposed early in life to DEHP—a plasticizer used in products ranging from medical devices to toys—showed significantly higher anxiety as adults, even long after exposure had ended. The animals were more hesitant to explore open spaces and spent more time frozen in place, classic signs of anxiety in rodents.

9. New procedure delivers lasting knee arthritis pain relief without surgery

   A minimally invasive treatment that blocks inflammation-driving blood vessels in the knee provided significant pain relief and improved function for osteoarthritis patients, with benefits lasting at least a year. The procedure was safe, highly successful, and could offer a new alternative for people seeking relief before considering knee replacement.

10. Scientists found an early depression clue hidden in children’s eyes

    Depression appears to change what children notice in the faces around them, but the effect depends on family history. Kids with a higher inherited risk became more focused on sadness, while lower-risk children lost some of their natural attention to happy expressions.

11. New study explores potential cross-species spread of chronic wasting disease

    A new study found that chronic wasting disease can sometimes spread silently, with infectious prions present even in animals that show no symptoms. While there is no confirmed human risk, researchers say the disease’s ability to evolve and spread across species warrants close attention.

12. Most people who stop GLP-1 drugs like Ozempic eventually return

    Many people prescribed GLP-1 drugs for type 2 diabetes (such as Victoza, Ozempic, or tirzepatide) stop taking them, but a surprising number later return to treatment. Researchers found that newer medications appear to keep patients on therapy longer, while side effects remain a major reason for discontinuation.

13. Semaglutide (Ozempic) linked to fewer bone fractures despite greater weight loss

    A large real-world study suggests semaglutide (Ozempic, Wegovy, Rybelsus) may offer an unexpected bonus for people with type 2 diabetes: stronger protection against bone fractures while delivering greater weight loss. Researchers analyzing health records from nearly 60,000 adults found that people taking semaglutide experienced about 15% fewer fractures than those using other common weight-loss medications, despite losing more weight.

14. Copper drug clears toxic Alzheimer’s proteins and restores memory

    A copper-based compound restored the brain’s ability to clear toxic Alzheimer’s proteins, dramatically reducing amyloid buildup and improving memory in laboratory experiments. The findings point to a potentially fast-tracked new treatment strategy because the drug has already been tested in humans for other neurological conditions.

15. This popular brain supplement was linked to shorter lifespans in men

    A large-scale study suggests that men with higher levels of the amino acid tyrosine may have shorter lifespans, potentially losing close to a year of life expectancy. The finding is especially intriguing because tyrosine is commonly associated with brain health and is often used in supplements aimed at boosting focus and performance.