Health & Medicine News

February 21, 2026

Top Headlines

“Celtic Curse” Hotspots Found in Scotland and Ireland with 1 in 54 at Risk

Feb. 21, 2026 Researchers have mapped the genetic risk of hemochromatosis across the UK and Ireland for the first time, uncovering striking hotspots in north-west Ireland and the Outer Hebrides. In some regions, ...

Scientists Discover Why High Altitude Protects Against Diabetes

Feb. 21, 2026 Living at high altitude appears to protect against diabetes, and scientists have finally discovered the reason. When oxygen levels drop, red blood cells switch into a new metabolic mode and absorb large amounts of glucose from the blood. This helps ...

Ultramarathons May Damage Red Blood Cells and Accelerate Aging

Feb. 21, 2026 Running extreme distances may strain more than just muscles and joints. New research suggests ultramarathons can alter red blood cells in ways that make them less flexible and more prone to breakdown, potentially interfering with how they deliver ...

Generative AI Analyzes Medical Data Faster Than Human Research Teams

Feb. 21, 2026 Researchers tested whether generative AI could handle complex medical datasets as well as human experts. In some cases, the AI matched or outperformed teams that had spent months building prediction models. By generating usable analytical code from ...

Common Pneumonia Bacterium May Fuel Alzheimer’s Disease

Feb. 21, 2026 A common bacterium best known for causing pneumonia and sinus infections may also play a surprising role in Alzheimer’s disease. Researchers found that Chlamydia pneumoniae can invade the retina and brain, where it sparks inflammation, nerve cell ...

Scientists Reveal How Exercise Protects the Brain from Alzheimer’s

Feb. 20, 2026 Exercise may sharpen the mind by repairing the brain’s protective shield. Researchers found that physical activity prompts the liver to release an enzyme that removes a harmful protein causing the blood-brain barrier to become leaky with age. In ...

Doctors Implant Dopamine-producing Stem Cells in Parkinson’s Patients

Feb. 20, 2026 A groundbreaking clinical trial is testing whether specially engineered stem cells can help the brain restore its own dopamine production in people with Parkinson’s disease. Because the condition is driven by the gradual loss of dopamine-producing ...

Air Pollution Linked to Higher Alzheimer’s Risk in 28 Million Older Americans

Feb. 20, 2026 Breathing polluted air may do more than harm your lungs — it could also increase your risk of Alzheimer’s disease. In a sweeping study of nearly 28 million older Americans, researchers found that ...

Scientists Find Cancer-linked Chemicals in Popular Hair Extensions

Feb. 19, 2026 A sweeping new study has uncovered a troubling mix of hazardous chemicals in popular hair extensions, including products made from human hair. Researchers detected dozens of substances linked to cancer, hormone disruption, reproductive harm, and ...

Scientists Discover the Body’s Hidden “Off Switch” for Inflammation

Feb. 19, 2026 A new human study has uncovered how the body naturally turns off inflammation. Researchers found that fat-derived molecules called epoxy-oxylipins rein in immune cells that can otherwise drive chronic disease. Using a drug to boost these molecules ...

Scientists Finally Explain Why Chronic Constipation Treatments Often Fail

Feb. 19, 2026 A newly discovered bacterial duo may be the hidden cause of chronic constipation. The two microbes break down the colon’s protective mucus layer, leaving stool dry and hard — a problem traditional laxatives don’t fix. Parkinson’s patients, ...

The Nearsightedness Explosion May Be Fueled by Dim Indoor Light, Not Just Screens

Feb. 19, 2026 Myopia is skyrocketing around the world, often blamed on endless screen time — but new research suggests the real culprit may be something more subtle. Scientists at SUNY College of Optometry ...

Latest Headlines

updated 9:41am EST

This Reengineered HPV Vaccine Trains T Cells to Hunt Down Cancer

Feb. 18, 2026 Northwestern researchers have shown that when it comes to cancer vaccines, arrangement can be just as important as ingredients. By repositioning a small fragment of an HPV protein on a DNA-based ...

Sugary Drinks Linked to Rising Anxiety in Teens

Feb. 18, 2026 Sugary drinks may be linked to more than just physical health problems in teens. A new review of multiple studies found a consistent association between high consumption of beverages like soda, ...

Intermittent Fasting Fails to Beat Standard Dieting for Weight Loss

Feb. 18, 2026 Intermittent fasting has become one of the most talked-about weight loss trends in recent years, promising dramatic results with simple changes to when you eat. But a major Cochrane review suggests ...

Viagra and Shingles Vaccine Show Surprising Promise Against Alzheimer’s

Feb. 18, 2026 A major new study has spotlighted three familiar medicines that could take on an unexpected new role in the fight against Alzheimer’s disease — with a shingles vaccine emerging as the ...

Breakthrough CRISPR System Could Reverse Antibiotic Resistance Crisis

Feb. 18, 2026 Antibiotic resistance is racing toward a global crisis, with “superbugs” projected to cause over 10 million deaths annually by 2050. Now, scientists at UC San Diego have unveiled a powerful new ...

People Who Switched to Cannabis Drinks Cut Their Alcohol Use Nearly in Half

Feb. 17, 2026 A new University at Buffalo study suggests cannabis-infused beverages could help some people cut back on alcohol. In a survey of cannabis users, those who drank cannabis beverages reported cutting ...

One Stem Cell Generates 14 Million Tumor-Killing NK Cells in Major Cancer Breakthrough

Feb. 17, 2026 Scientists in China have unveiled a breakthrough way to mass-produce powerful cancer-fighting immune cells in the lab. By engineering early-stage ...

Toxic Metals Found in Bananas After Brazil Mining Disaster

Feb. 17, 2026 Researchers investigating crops grown in soil contaminated by the 2015 mining disaster in Brazil discovered that toxic metals are moving from the earth into edible plants. Bananas, cassava, and cocoa ...

Ancient DNA Solves 12,000-Year-Old Mystery of Rare Genetic Growth Disorder

Feb. 17, 2026 An Ice Age double burial in Italy has yielded a stunning genetic revelation. DNA from a mother and daughter who lived over 12,000 years ago shows that the younger had a rare inherited growth ...

Scientists Discover Brain Switches That Clear Alzheimer’s Plaques

Feb. 17, 2026 Researchers have identified two brain receptors that help the brain clear away amyloid beta, a hallmark of Alzheimer’s disease. By stimulating these receptors in mice, scientists increased levels ...

The Human Exposome Could Change Everything We Know About Disease

Feb. 14, 2026 Scientists are launching an ambitious global effort to map the “human exposome” — the lifelong mix of environmental and chemical exposures that drive most diseases. Backed by new partnerships ...

This New Blood Test Could Detect Cancer Before It Shows Up on Scans

Feb. 16, 2026 A new light-based sensor can spot incredibly tiny amounts of cancer biomarkers in blood, raising the possibility of earlier and simpler cancer detection. The technology merges DNA nanotechnology, ...

Stop Eating 3 Hours Before Bed to Improve Heart Health

Feb. 15, 2026 A simple shift in your evening routine may give your heart a measurable boost. In a new study, adults who stopped eating and dimmed the lights three hours before bed and extended their overnight fast ...

AI Uncovers the Hidden Genetic Control Centers Driving Alzheimer’s

Feb. 15, 2026 Scientists have created the most detailed maps yet of how genes control one another inside the brains of people with Alzheimer’s disease. Using a powerful new AI-based system called SIGNET, the ...

Scientists Make Microplastics Glow to See What They Do Inside Your Body

Feb. 13, 2026 Microplastics and nanoplastics are now found everywhere on Earth, from ocean depths to agricultural soils and even inside the human body. Yet scientists still struggle to understand what these ...

The Exact Speed That Makes an AI Prosthetic Arm Feel Like Your Own

Feb. 13, 2026 A robotic arm that moves too quickly can feel creepy. One that moves too slowly feels awkward and unhelpful. In a VR study, researchers found that AI-powered prosthetic arms were best accepted when ...

Nearly 200,000 People Reveal the Real Key to Heart Health

Feb. 17, 2026 A decades-long study of nearly 200,000 adults challenges the low-carb versus low-fat debate. Both eating patterns were tied to lower heart disease risk when they emphasized whole grains, plant-based ...

Lab Grown Human Spinal Cord Heals After Injury in Major Breakthrough

Feb. 16, 2026 Researchers have built a realistic human mini spinal cord in the lab and used it to simulate traumatic injury. The model reproduced key damage seen in real spinal cord injuries, including ...

Large Study Finds No Link Between mRNA COVID Vaccine in Pregnancy and Autism

Feb. 15, 2026 Researchers tracked more than 400 toddlers to see whether mRNA COVID-19 vaccination during or just before pregnancy was linked to autism or developmental delays. After detailed assessments of speech, ...

Exercise May Be One of the Most Powerful Treatments for Depression and Anxiety

Feb. 16, 2026 A sweeping review of global research suggests that exercise—especially aerobic activities like running, swimming, and dancing—can be one of the most powerful ways to ease depression and anxiety. ...

Giving People Cash Didn’t Cause More Injuries or Deaths

Feb. 16, 2026 As cash transfer programs expand across the United States, critics often warn that giving people money could spark reckless behavior, leading to injuries or even deaths. But a sweeping 11-year ...

Scientists Discover a Hidden Gut Bacterium Linked to Good Health

Feb. 14, 2026 A global study has uncovered a mysterious group of gut bacteria that shows up again and again in healthy people. Known as CAG-170, these microbes were found at lower levels in people with a range of ...

Scientists Find Nerves Actively Fuel Pancreatic Cancer

Feb. 15, 2026 Scientists have uncovered a hidden partnership between pancreatic cancer and the nervous system. Support cells in the pancreas lure nerve fibers, which then release signals that accelerate early ...

Changing When You Eat Dramatically Reduced Crohn’s Disease Symptoms

Feb. 11, 2026 A new clinical trial suggests that changing when you eat could make a meaningful difference for people living with Crohn’s disease. Researchers found that time-restricted feeding, a form of ...

Just 5 Weeks of Brain Training May Protect Against Dementia for 20 Years

Feb. 11, 2026 A simple brain-training program that sharpens how quickly older adults process visual information may have a surprisingly powerful long-term payoff. In a major 20-year study of adults 65 and older, ...

AI Reads Brain MRIs in Seconds and Flags Emergencies

Feb. 10, 2026 Researchers at the University of Michigan have created an AI system that can interpret brain MRI scans in just seconds, accurately identifying a wide range of neurological conditions and determining ...

A Secret Cell Alliance May Explain Why Ovarian Cancer Is So Deadly

Feb. 9, 2026 Scientists have discovered why ovarian cancer spreads so rapidly through the abdomen. Cancer cells enlist normally protective abdominal cells, forming mixed groups that work together to invade new ...

Massive Study Finds Most Statin Side Effects Aren’t Caused by the Drugs

Feb. 15, 2026 A massive review of 23 randomized trials found that statins do not cause the vast majority of side effects listed on their labels. Memory problems, depression, sleep issues, weight gain, and many ...

When Immune Cells Stop Fighting Cancer and Start Helping It

Feb. 10, 2026 Scientists have uncovered a surprising way tumors turn the immune system to their advantage. Researchers at the University of Geneva found that neutrophils—normally frontline defenders against ...

Ultra-Processed Foods Linked to 47% Higher Risk of Heart Attack and Stroke

Feb. 10, 2026 Ultra-processed foods are everywhere in the American diet, and researchers are finding alarming consequences. Using national health data, scientists found that adults with the highest intake of these ...