Feel Well About These 7 Foods That Strengthen Your Immune System

2. Citrus Fruits

Vitamin C delivered by grapefruit, oranges, tangerines and clementines is a big ally against colds, notes Healthline.com. While you can load up on these types of fruits if you’re already suffering symptoms of a cold, you can use them to avoid getting sick in the first place, explains the source.

“Because your body doesn’t produce or store it, you need daily vitamin C for continued health,” adds the source. It’s believed that Vitamin C increases your white blood cell count, which is a key in fighting off infections.

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