At least one in five U.S. children aged 1 to 11 don't get enough vitamin D and could be at risk for a variety of health problems including weak bones, the most recent national analysis suggests.

Blood levels of mercury are similar in children with autism and in those developing typically, a study released Monday found.

Parents and caregivers who place car seats on beds, kitchen counters and other places outside the car injured 43,000 U.S. children over five years, researchers reported on Monday.

Diarrhea still claims the lives of 1.5 million children under the age of five a year, UN agencies warned Wednesday, as they launched a new campaign against the ailment.

More than half of sudden infant deaths reviewed in a study released Wednesday occurred while the babies shared a bed or sofa with a parent.

Willy Wonka would be horrified. Children who eat too much candy may be more likely to be arrested for violent behavior as adults, new research suggests.

Children who are the most popular and powerful at school also enjoy better health in adult life compared to counterparts at the bottom end of the pecking order, said a Swedish study published Tuesday.

More than half a million U.S. children yearly have bad reactions or side effects from widely used medicines that require medical treatment and sometimes hospitalization, new research shows.

Two hundred children are suffering from lead poisoning in southwest China, the country's third such case of mass sickening in the past month, an official newspaper said Monday.

Some childhood lead poisonings in Maine last year came from an unusual source — lead dust tracked into the family car.