Massage helps ward off bugs by boosting your “natural killer cells,” the immune system’s first line of defense against invading illness. “We know that cortisol destroys natural killer cells,” Field says. “Therefore, since massage decreases cortisol, your immune cells get a boost.” Massage even seems to boost immunity in those people with severely compromised immune systems, such as breast-cancer patients. “There are many things we can control that make us less susceptible to illness. None of them comes in the form of a pill.” There are so many great reasons to book yourself a massage, do it for your health!