Immune-Boosting Foods You Should Be Eating This Winter

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Pumpkin seeds are a good source of zinc, which strengthens the immune system. Try roasting them with salt and cinnamon for a low-sugar, high-fiber snack.

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This whole grain is packed with a type of fiber called beta glucan, which activates white blood cells so they can fight off infection. Opt for steel-cut oats, which have double the beta glucans of their more refined counterparts. 

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Sweet potatoes are naturally delicious. They are bright orange in color because they're full of beta-carotene (which our bodies convert to disease-fighting vitamin A). Roast them, mash them, or bake them into fries.

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Yolk contains zinc and selenium, which are important minerals for strengthening the immune system. Make an easy frittata by combining an array of colorful leftover vegetables with egg.

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Cinnamon is anti-viral, anti-bacterial, and anti-fungal — who knew this spice packed disease-fighting powers? Use it to flavor oatmeal, roasted fruit, baked goods, and even popcorn.

Kristie Collado is The Daily Meal's Cook Editor. Follow her on Twitter @KColladoCook.