HIV Prevention Pill May Not Need to Be Taken Daily

Research suggests Truvada still works when taken before and after sex

Metformin May Not Help Obese Teens With Type 1 Diabetes

Study found most benefits waned over time, but one expert believes more research is needed

New Diabetes Cases Among Americans Drop for First Time in Decades: CDC

But another report shows U.S. has more cases than 37 other developed nations

Planned Cesareans Tied to Slight Increase in Asthma Risk for Kids

But second report finds countries with low C-section rates had higher death rates for infants, mothers

Possible New Weight-Loss Tool: Blocking Stomach Artery

Experimental procedure tested in 4 morbidly obese patients so far

Sleep Apnea Devices Lower Blood Pressure

Researchers find both common treatments, CPAP and MADs, produce modest decreases

Smog Linked to Heart Disease in Seniors

Study shows higher levels of coarse particulate matter are a problem

After Concussion Symptoms Fade, Slowed Blood Flow in Brain May Persist

But preliminary study doesn't determine whether that is cause for concern, experts say

Brain Gains for Older Adults Who Start Exercising

Besides improved heart and lung health, study detected growth in cerebral cortex

Crave Coffee Too Much? Talk Therapy May Help

Caffeine intake dropped more than 75 percent after just one hour-long session, study found