While HDL cholesterol is considered the “good” kind for heart and brain health, too much or too little of it may up a person’s risk of dementia, new research suggests. “This study is especially informative because of the large number of participants and long follow-up,” noted study author Maria Glymour, of Boston University. She said…  read on >  read on >

America’s kids are safer now than a decade ago when it comes to many types of injury, with two glaring exceptions: drugs and guns. That’s the crux of a new study that looked at injury trends among U.S. children and teenagers between 2011 and 2021. It found that nonfatal injuries from accidents and assaults fell…  read on >  read on >

More than 80% of eligible Americans did not get a COVID-19 booster shot last fall. Now, a new study reveals the reasons for the hesitation. Nearly 40% of survey participants said a prior COVID-19 infection factored into their decision to not get the booster. Another 31.5% were worried about side effects. And an additional 28%…  read on >  read on >

People recovering from wounds or severe burns might one day be treated with fully functional “bioprinted” skin created in a lab, a new study suggests. Researchers say they “printed” skin samples containing all six major human cell types found in skin. The result was multi-layered, full-thickness skin containing all three layers present in normal human…  read on >  read on >

While studies of ADHD and driving usually target teens, a new one focused on seniors found they have a significantly higher risk of car crashes. Older adults with attention-deficit/hyperactivity disorder (ADHD) were also more likely to slam on the brakes and get traffic tickets, the study found. “Little is known about ADHD in seniors,” said…  read on >  read on >

Health care workers who serve millions of Americans began a three-day strike on Wednesday after contract negotiations over staffing levels stalled. More than 75,000 members of the Coalition of Kaiser Permanente Unions began walking off their jobs as early as 6 a.m. in Virginia and Washington, D.C., the Washington Post reported. The union, whose contract…  read on >  read on >

Breast cancer patients who undergo a mastectomy can probably benefit from a shorter course of more intense radiation therapy, a new study indicates. Hypofractionated radiation therapy — which provides a higher dose each session over three weeks — provides the same protection against breast cancer recurrence and post-surgical complications as a standard course of lower-dose…  read on >  read on >