Health & Medicine

1. Millions of kids take melatonin but doctors are raising red flags

   Melatonin is now widely used to help children sleep, but scientists say the enthusiasm may be getting ahead of the evidence. A major review found clear benefits for children with conditions like autism and ADHD, yet far less data exists for typical childhood insomnia. Researchers also warn about mislabeled supplement doses and rising accidental ingestions among young kids. Experts say melatonin should be used carefully and only alongside proven behavioral sleep strategies.

2. Scientists tested vitamin D for COVID and found an unexpected long COVID clue

   A major clinical trial has delivered an unexpected twist in the search for ways to fight COVID-19 and its lingering effects. Researchers at Mass General Brigham found that taking high doses of vitamin D3 did not make COVID-19 infections less severe or reduce hospital visits. However, the study uncovered a subtle but intriguing signal suggesting that people who consistently took vitamin D supplements might be slightly less likely to develop long COVID symptoms weeks after infection.

3. Fathers’ tobacco use linked to metabolic changes in their children

   A new study in mice suggests that a father’s nicotine exposure could influence the metabolic health of his children. Researchers found that when male mice consumed nicotine, their offspring showed changes in how their bodies handled sugar, including differences in insulin and glucose levels and altered liver function. These shifts may be linked to a higher risk of diabetes and related metabolic diseases.

4. The financial crisis that quietly stunted a generation

   When the Asian financial crisis sent rice prices soaring in Indonesia in the late 1990s, the shock didn’t just strain household budgets—it left lasting marks on children’s bodies. Researchers from the University of Bonn found that kids exposed to the food price surge were more likely to experience stunted growth and, years later, a higher risk of obesity. The findings suggest that during crises, families often maintain calorie intake but cut back on nutrient-rich foods, creating hidden nutritional deficiencies that disrupt healthy development.

5. How often do people really fart? Scientists built smart underwear to find out

   Researchers have created “Smart Underwear,” a wearable device that measures flatulence by detecting hydrogen produced by gut microbes. Early tests suggest people may pass gas about 32 times a day—much higher than previous estimates. The device gives scientists a new way to track gut microbial activity in everyday life. It will power a new nationwide study called the Human Flatus Atlas to map normal patterns of gas production.

6. Scientists discover ALS protein that links DNA repair to cancer and dementia

   A protein tied to ALS and dementia may have a much bigger role in disease than scientists realized. Researchers found that TDP43 controls a key DNA repair process, but when the protein becomes imbalanced, the repair system can spiral out of control, harming neurons and destabilizing DNA. The team also discovered that high levels of the protein are linked to increased mutation rates in cancer. The discovery places TDP43 at the center of both neurodegeneration and cancer biology.

7. Hidden deep-sea proteins could supercharge disease tests

   Hidden in volcanic lakes and deep-sea vents, scientists have discovered tough new DNA-binding proteins built to survive extreme conditions. After scanning huge genetic databases, researchers found molecules that remain stable under heat, salt, and harsh chemistry. One of these proteins significantly improved rapid LAMP diagnostic tests, making them faster and more sensitive. The discovery could help create better tools for detecting infectious diseases.

8. A lab mistake at Cambridge reveals a powerful new way to modify drug molecules

   Cambridge scientists have discovered a light-powered chemical reaction that lets researchers modify complex drug molecules at the final stages of development. Unlike traditional methods that rely on toxic chemicals and harsh conditions, the new approach uses an LED lamp to create essential carbon–carbon bonds under mild conditions. This could make drug discovery faster and more environmentally friendly. The breakthrough was uncovered unexpectedly during a failed laboratory experiment.

9. Severe COVID or flu may raise lung cancer risk years later

   A severe case of COVID-19 or influenza could increase the risk of lung cancer later on, according to new research. Scientists discovered that serious viral infections can alter immune cells in the lungs, leaving behind chronic inflammation that may help tumors develop months or years later. The increased risk was seen mainly after severe infections that required hospitalization. Vaccination, however, appears to prevent the dangerous lung changes.

10. Study finds two types of colon polyps can raise bowel cancer risk fivefold

    Researchers studying over 8,400 colonoscopies discovered that having both adenomas and serrated polyps in the bowel can raise the risk of serious precancerous changes by up to five times. These two polyp types may represent separate cancer pathways that can occur at the same time. Nearly half of patients with serrated polyps also had adenomas, making this high-risk combination more common than expected. The results emphasize the importance of early detection and regular colonoscopy monitoring.

11. Textbooks were wrong: Scientists reveal the surprising way human hair really grows

    Hair may grow in a completely different way than scientists once believed. Instead of being pushed out from the root, new research shows that moving cells inside the follicle actually pull the hair upward like a microscopic motor. Advanced 3D imaging revealed a spiral movement of cells that generates this force. The finding could change how scientists study hair loss and design future treatments.

12. Monty Python Got It Wrong About Medieval Disease

    In medieval Denmark, people could pay for more prestigious graves closer to the church — a sign of wealth and status. But when researchers examined hundreds of skeletons, they discovered something unexpected: even people with stigmatized diseases like leprosy were buried in these high-status spots. Instead of excluding the sick, many communities appear to have treated them much like everyone else.

13. Gut bacteria that make serotonin may hold the key to IBS

    Researchers have identified two gut bacteria that can produce serotonin, a key chemical that regulates bowel movements. In experiments with mice lacking serotonin, the microbes boosted serotonin levels, increased nerve cells in the colon, and normalized intestinal movement. The study also found that people with IBS have lower levels of one of these bacteria. The discovery suggests gut microbes could become a powerful new target for treating digestive disorders.

14. Microplastics may be quietly damaging your brain and fueling Alzheimer’s and Parkinson’s

    Tiny plastic particles may be quietly threatening brain health. New research suggests microplastics—now widely found in food, water, and even household dust—could trigger inflammation and damage in the brain through multiple biological pathways. Scientists estimate adults may consume about 250 grams of these particles each year, and some can accumulate in organs including the brain.

15. Depression may start with an energy problem in brain cells

    Researchers have discovered a surprising change in how cells produce energy in people with depression. Brain and blood cells in young adults with major depressive disorder produced more energy molecules at rest but had trouble increasing energy production when needed. Scientists believe this imbalance may contribute to symptoms such as fatigue and low motivation. The finding could help pave the way for earlier diagnosis and more personalized treatments.