Can you tell how fast you're aging by how many colds you get?

Infections attack us all the time. How your body handles those infections determines how sick they make you. If your immune system is strong, you'll fight off most of them. But when your immune system is weak, you get sick. Now researchers are learning the key to keeping your immune system strong - and it has to do with how fast you age.

The fat you should eat to lose those unwanted pounds

Is it possible that the kind of fats or oils you eat will determine what your metabolic rate is and how much you like to exercise? A new study says it’s not only possible, it’s likely.

A widely available treatment for shingles that has no side effects

Herpes zoster is an unwanted infection that can hit mature people. The cause is varicella. You know it as the chickenpox virus. In many, an incomplete immune response to the initial exposure leads to a local infection in a nerve. The common name for herpes zoster is shingles.