(HealthDay News) -- Radon is an odorless but toxic gas that can seep into buildings, including ground-level homes.

(HealthDay News) -- Tattoos may be popular forms of body art and expression, but they pose a number of potential health problems, the U.S. Food and Drug Administration says.

(HealthDay News) -- People with type 2 diabetes either don't produce enough insulin, or their bodies don't process insulin correctly. More than 90 percent of people with diabetes have type 2, the Academy of Nutrition and Dietetics says.

THURSDAY, Dec. 6 (HealthDay News) -- Older adults are less able to spot people with untrustworthy faces, which may help explain why they're more likely to be victims of fraud, according to new research.

THURSDAY, Dec. 6 (HealthDay News) -- In women with breast cancer that has recurred but remains confined to in or near the breast, post-surgical chemotherapy appears to boost survival, new research shows.

THURSDAY, Dec. 6 (HealthDay News) -- Fruit flies have a special brain circuit that prevents them from eating, or laying their eggs on, spoiled food that contains toxic molds and bacteria, a new study finds.

THURSDAY, Dec. 6 (HealthDay News) -- Researchers who found the chemical bisphenol A (BPA) in the livers of fetuses say it shows that there is considerable exposure to the chemical during pregnancy.

WEDNESDAY, Dec. 5 (HealthDay News) -- A new study of couples treated for infertility found a significantly higher death rate among couples who remained childless and lower odds of psychiatric illness among those who adopt.

THURSDAY, Dec. 6 (HealthDay News) -- Children born after in vitro fertilization are more likely to have asthma, according to a new British study.

THURSDAY, Dec. 6 (HealthDay News) -- Taking a patient's weight into account when choosing blood pressure medications might help prevent strokes, heart attacks and death, a new study suggests.

WEDNESDAY, Dec. 5 (HealthDay News) -- People taking the widely prescribed sedatives known as benzodiazepines may be putting themselves at greater risk for developing pneumonia, British researchers report.

THURSDAY, Dec. 6 (HealthDay News) -- As air pollution in the United States declines, it appears Americans are living longer, according to a new study.

THURSDAY, Dec. 6 (HealthDay News) -- Believing you had a large meal can make you feel less hungry hours after the meal, a finding that could lead to new methods of weight control, researchers say.

THURSDAY, Dec. 6 (HealthDay News) -- Younger women with aggressive breast cancers often benefit more than older women when they undergo early, pre-operative chemotherapy, a new study finds.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay: