ADHD, or attention-deficit/hyperactivity disorder, is among the costliest of behavioral disorders. Its combination of inattention, impulsivity and hyperactivity leads to accidental injuries, school failure, substance abuse, antisocial behavior and more. Yet despite nearly a century of study, the disorder’s roots remain mysterious.

Going back for a second dessert after your holiday meal might not be the best strategy for living a long, cancer-free life say researchers from the University of Alabama at Birmingham. That’s because they’ve shown exactly how restricted calorie diets — specifically in the form of restricted glucose — help human cells live longer.

Having junk in your trunk is healthier than a spare tire around the gut, new research suggests. The extra padding on the backside and thighs could even help to protect against disease.

The results come from a review that summarizes various studies on the health effects of different fat stores in the body, particularly around the hips and thighs.