For centuries, the nature of a fever — and whether it's good or bad — has been hotly contested. In ancient Greece, the physician Hippocrates thought that fever had useful qualities, and could cook an ...

We have trillions of body clocks — a central one in the brain and others in each cell of our body. Here's how they work with light to control our health. When you purchase through links on our site, ...

Sugar metabolism refers to the process by which the body breaks down carbohydrates into sugars, including glucose and fructose. The body uses these sugars as a source of energy. The body metabolizes ...

Smart scales track changes in your muscle mass, body fat percentage and other health metrics — but how do smart scales work, and how accurate are they? When you purchase through links on our site, we ...

The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...