Cold Remedies: say bye bye cold forever Raise Your D Levels

Supernutrient vitamin D strengthens bones, fights inflammation, and boosts your mood. Turns out, it can also help slay infections. In a national study, people with low D levels were 36 percent more likely to catch respiratory ailments. Other current research shows that, when people with ample D do get sick, they may recover faster. "Vitamin D helps your body produce a protein called cathelicidin that fights bacteria and viruses," says an associate professor of medicine at Harvard Medical School.