Scientists are proving that intestinal bacteria can help health — but for what conditions? Should you take probiotic supplements or eat foods with beneficial bugs? What does the science say — and not say?

This year’s influenza vaccine in the United States contains three strains of the influenza virus. Last March, experts at the U.S. Centers for Disease Control and Prevention (CDC) and the World Health Organization chose those strains based on the varieties of flu virus that were present at the end of North America’s flu season.
The decision [...]

Fast genomic analysis could open the door to breakthroughs in health, ecology and genetics. How do these machines work, and what have they taught about obesity, microbial diversity, and drug treatment?

Science shows a correlation between happiness and health, success and fulfillment. But do they make us happy? Or are we healthy and wealthy because we are happy?

To battle the bulging waistline, the feds have devised 12 food pyramids to help choose a lifestyle that balances nutrition and excercise. Is this mound helpful?

Spices and flavorings can be good for your health. Onion, garlic, hot pepper: They don’t just taste good…

Why is obesity unhealthy, and why is it getting so common? What are the keys to losing weight?