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Study: Vitamin D lowers bone-fracture risk only at high doses
July 4th, 2012
05:01 PM ET

Study: Vitamin D lowers bone-fracture risk only at high doses

If you're wondering whether to take a vitamin D supplement to keep your bones healthy, it's understandable if you - and even your doctor - are at a loss.

Vitamin D is essential for bone health, but the research on supplements has been inconsistent. Some studies have concluded that vitamin D supplements can lower the risk of bone fractures, while others suggest the pills provide little to no benefit.

The latest study on the topic, published today in the New England Journal of Medicine, may help clear up some of the confusion.
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Sleepy brains drawn to junk food
June 10th, 2012
12:01 AM ET

Sleepy brains drawn to junk food

As any college student or shift worker will tell you, staying up all night or even just skimping on sleep can lead a person to seek out satisfying, calorie-packed foods.

An emerging body of research suggests that sleep-related hunger and food cravings, which may contribute to weight gain, are fueled in part by certain gut hormones involved in appetite. But our brain, and not just our belly, may play a role as well.

According to two small studies presented today at a meeting of sleep researchers in Boston, sleep deprivation appears to increase activity in areas of the brain that seek out pleasure - including that provided by junk food. To make matters worse, sleepiness also may dampen activity in other brain regions that usually serve as a brake on this type of craving.
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Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.

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