10 Simple Ways to Fend Off Colds and Flu
Vitamin D plays a huge role in helping your body ward off illness. Sadly, many of us don't get enough of it. Rather than soaking up more sun (who can do that in the dead of winter, anyway?), opt for foods rich in vitamin D. These include egg yolks, fish (e.g., shrimp, sardines, wild-caught salmon), cereal, orange juice, milk, and yogurt.