For decades, many of us have thought we could “boost” our immune systems with vitamin C or herbs, which would fight contagious illnesses, such as colds and the flu. But in reality, there are no quick ...

Plus, how to tell if it needs healing in the first place.

As far back as I can recall, people have been searching for ways to strengthen their immune systems—either through food, vitamins, or changes in lifestyle. As scientists continue to investigate how ...