Vitamin D is known to strengthen bones and can be particularly beneficial in protecting the elderly from brittle bones. However, it is possible to consume an excessive, potentially harmful, amount of vitamin D.

The boy genius who can't even drive yet may have developed a test that could save thousands of lives every year. The winner of the 2012 Intel International Science and Engineering Fair has found a way to diagnose pancreatic cancer.

Legendary  folk singer and guitarist, Doc Watson - who influenced guitar players in his genre and beyond - has died. His death follows abdominal surgery he underwent less than a week ago. Watson was 89.

The practice of blood-letting or bleeding patients was abandoned in the 19th century when it became clear there was little benefit. New research suggests the barbaric-sounding practice could offer a very real heart benefit.

Cancer is one masterful disease process. Why? It's a master at finding its way around obstacles like treatment drugs. That's why it may take a combination approach to put the screws to some cancers.

In the last decade, an explosion in gene research and subsequent genetic tests have offered new insight into genetic diseases. However, this new push also comes with concerns over protecting genetic information.

Rehabilitation after a stroke can be key to regaining functioning, but it can be a challenge for patients who live far from a facility that offers stroke rehab or who cannot attend a supervised program.