If you're a savvy That's Fit reader, then you already know that a diet rich in fruits, vegetables, whole grains, and lean proteins is important for your long-term health. But did you know that same healthy diet can protect you in the short term from things like cold and flu? That's because your immune system, which protects you from infection and other illnesses, needs that nutrition to run at its peak.

Prevention has a great article on how to eat right for your immune system. It's not about stocking up on one particular food, it's about properly fueling your body so your internal systems can do their job. Take a look at the gallery below to find out what steps you can take to build a stronger defense against colds and germs.