Flu season peaks in the winter, and colds get passed around more when we’re cooped up indoors thanks to frigid temperatures. No one likes being sick—but what can you do other than washing your hands often and staying away from infected people?

Here’s a pro tip: By eating the right foods throughout the winter, you can boost your body’s ability to stave off sickness. Just as you work on strength and size gains in the gym, you can work on your immune system in the kitchen.

Here are 13 foods that will boost your immunity, so your body can better fight back against germs and keep you healthy all winter long.

Christy Brissette, M.S., R.D. is a media dietitian whose work can be found here.