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.
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.
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.
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.
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.