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After suffering a serious heart attack two years ago, Ken Miles volunteered to be patient No. 1 in a risky clinical trial involving stem cells

A lot of stem cell studies give hope but ultimately don't pan out.

The Supreme Court will decide whether President Obama's landmark health care legislation, which requires that all Americans buy health insurance or pay a penalty, is unconstitutional. Jan Crawford reports.

Ken Milles' heart improved 50 percent after receiving laboratory-grown stem cells in small, experimental medical trial

Agency says vaccine is just effective as rival vaccine at preventing potentially deadly infection

From tooth-flossing to playing Tetris, life extension strategies can be surprisingly simple

After experimental stem cell therapy, patients' failing hearts showed better function and less scarring

Study shows increased heart risk among soda drinkers - even in absence of weight gain

"If you would like to dine gluten-free, please ask to see our gluten-free menu." Restaurants are printing notes like this in droves, and hosts are now googling phrases like "lacto-ovo" before dinner parties.

Adding Xarelto to usual drug regimen cut risk of subsequent heart trouble but was linked to increased risk for bleeding

A new report says the worldwide diabetes epidemic will explode over the next 20 years. Betty Nguyen reports.

A panel of pediatricians is making a major change to medical guidelines for children, saying all kids between the ages of 9 and 11 should be screened for high cholesterol. Dr

Number of people with diabetes mellitus predicted to reach 552 million in next two decades

Lauder, one of originators of pink ribbon campaign, died of complications of ovarian cancer

Rebecca Jarvis speaks with Dr. David Langer about "brain freeze, or a moment when you just can't recall something important -- like the one Rick Perry had in a GOP debate -- and how to avoid it.