Which risk factor is responsible for more deaths around the world than any other? Not smoking. Not even high blood pressure. It's a poor diet.

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Not long ago, a 4-year-old boy died of the flu. His mother, under doctor's orders, watched his two little brothers like a hawk, terrified they might get sick and die, too.

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If you're a fan of the "fat-burning" keto diet, you'll be fired up about its ranking in the 2018 list of best diets from US News and World Report: It's tied for last, along with the relatively unknown Dukan diet.

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Have you ever wondered why some people seem to stay trim effortlessly, while the majority of Americans struggle with their weight?

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You might think you're fairly intelligent, but are you emotionally intelligent?

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Every January for the past 20 years, I have taken a few moments to ponder the answer to the question "what is the meaning of life?"

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There is no test doctors can use to conclusively determine whether someone will get Alzheimer's disease. "If you are in your 20s or 30s and want to know if you will get the disease, we don't have information to determine that now," said Heather Snyder, director of medical and scientific operations at the Alzheimer's Association.

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There has been a significant rise in accidental deaths, homicides and suicides among young people across the United States, and experts are calling it a wake-up call.

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Running is a great way to get in shape and just about everyone can do it. You don't need access to a fancy gym, expensive equipment, or other people to do the workout. You can simply throw on your sneakers and head out the door for a run. Easy as that!

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Are you having enough sex? You might have wondered if you should up your bedroom activity after reading about other couples' resolutions to have sex every day or about all the health benefits of getting horizontal.

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Sara Zaske's daughter, Sophia, rarely showed much interest in having her own cell phone -- that is, until they moved back to the United States from Germany.

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It's not unusual for children to sulk or throw a tantrum when parents demand they switch off the television or put down the phone, but for parents, what's on that screen -- or how long a child has been staring at it -- is the bigger worry.

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When doctors performed surgery on a man to remove what they suspected to be a bronchogenic carcinoma, they instead found a toy traffic cone he had swallowed in 1974.

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Have you ever waited with excitement to share some amazingly good news with your partner, only to experience a surge of frustration and resentment when he or she barely reacts to your announcement? As a society, we place a huge amount of emphasis on being there for each other when we're in need, but past research has actually shown that relationship satisfaction is influenced as much, if not more, by how we react to each other's good news. Whereas emotional support from a partner when we're down can have the unfortunate side-effect of making us feel indebted and more aware of our negative emotions, a partner's positive reaction to our good news can magnify the benefits of that good fortune and make us feel closer to them.

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