Health & Medicine

1. Scientists reveal what sparkling water really does to your teeth

   Unsweetened sparkling water may offer a tooth-friendlier alternative to sugary soda, according to a small preliminary study tracking how different drinks change mouth acidity. Soda caused the strongest and longest drop in salivary pH, while sparkling water produced only a temporary decline before saliva restored normal conditions. Importantly, acidity remained above the level associated with enamel damage.

2. Eating within 8 hours may help keep the aging brain sharp

   Eating within a shorter daily window may help protect certain thinking skills as people age. In a small six-month trial, older women who limited eating to about 8 to 9 hours a day performed better on planning and problem-solving tests than those who ate over 12 hours. Both groups lost similar amounts of weight, hinting that when people eat could matter in addition to how much they eat.

3. Why the same DNA damage causes cancer in some people but not others

   A controlled mouse study has provided direct evidence that inherited genetics can steer how cancer begins and evolves after DNA damage. The discovery could eventually help doctors better predict cancer risk and tailor screening and treatments to each patient.

4. Why losing the wrong fat can trigger diabetes

   Scientists discovered that damaged fat cells can become inflamed, lose their ability to store lipids, and eventually vanish, disrupting the body’s metabolism. The findings show that diabetes can result not only from excess fat, but also from losing the healthy fat tissue the body needs.

5. A hidden Alzheimer’s tipping point may decide who gets dementia

   Scientists have identified a possible tipping point that helps determine whether Alzheimer’s-related brain changes lead to dementia. The key may lie in how the brain’s immune cells respond to plaques and tau, offering a promising new target for treatments designed to extend cognitive resilience.

6. CRISPR makes prostate cancer vulnerable to immunotherapy

   Scientists used CRISPR to make prostate cancer cells easier for the immune system to detect and destroy. The experimental treatment dramatically improved the effects of immunotherapy in mice and may offer hope for other hard-to-treat tumors.

7. Your AI calorie-tracking app may be off by 345 calories

   Popular AI-powered food apps may make calorie counting easier, but they may also leave out a surprisingly large part of the meal. Four apps underestimated calories and fat by about one-third when tested against carefully prepared meals. High-fat ketogenic dishes appeared to cause the most trouble, while carbohydrates were measured more consistently.

8. A daily fiber supplement reduced knee arthritis pain and improved strength

   A prebiotic fiber supplement reduced knee osteoarthritis pain while also improving grip strength and pain sensitivity in a six-week trial. The results hint at a fascinating gut-muscle-pain connection and suggest that a simple daily supplement may be easier to maintain than digital physiotherapy.

9. Oral GLP-1 drugs may quiet the brain’s food craving circuit

   Newer oral drugs related to semaglutide medications such as Ozempic reduced pleasure-driven eating in mice by quieting a deep brain reward circuit. The finding could open new avenues for understanding food cravings and potentially treating substance use disorder.

10. A single dose reversed autism-like symptoms in adult mice within hours

    Even mild inflammation during pregnancy led mouse offspring to develop persistent brain overactivity, sensory sensitivity, repetitive behaviors, and increased seizure risk. Remarkably, one dose of rapamycin improved nearly all of these problems within about two hours. The benefits were temporary, but they suggest that adult brain circuits may remain far more adaptable than previously believed.

11. Scientists discover a compound that could supercharge aging muscle repair

    A sulfur-based compound called LASSS appears to protect and supercharge a key protein involved in repairing damaged muscle. The discovery could eventually lead to new ways to slow muscle loss and preserve strength as people age.

12. A new antiviral could stop measles before an outbreak takes off

    An experimental pill prevented a measles-like virus from spreading through the air or through close contact in ferrets. It worked when given shortly before or after exposure and also shortened illness and the period when infected animals remained contagious. Researchers say the drug could one day complement vaccination and make outbreaks easier to contain.

13. APOE2 may protect the brain from Alzheimer’s and aging

    The longevity-linked APOE2 gene appears to protect brain cells by reducing DNA damage and helping neurons recover from stress. The finding could open a new path toward treatments that mimic APOE2’s defenses in people at higher genetic risk for Alzheimer’s.

14. The billion-dollar problem keeping Ozempic, Wegovy, and Zepbound from patients

    Ozempic, Wegovy, and similar drugs may deliver excellent health value, but covering them for millions of eligible patients could overwhelm insurance budgets. Researchers say better long-term support is needed and warn that low-cost compounded versions may carry serious safety risks.

15. Ozempic and Mounjaro linked to a surprising hair loss risk

    A large study suggests that GLP-1 drugs including Ozempic and Mounjaro may slightly increase the risk of hair loss in people with type 2 diabetes. Compared with two other common classes of diabetes medications, GLP-1 users had a significantly higher rate of alopecia, though the absolute risk was still low. The hair loss was mainly non-scarring, which means it may be reversible.