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Health.com: Foods That Make You Feel Better

Survive Cold Season: Kale, Spinach, Yams, Pumpkin, Carrots

Vitamin A is the VIP here, keeping mucous membranes moist and healthy so germs can't get past them, says David Katz, MD, founder of the Yale University Prevention Research Center and author of "Disease-Proof: The Remarkable Truth About What Makes Us Well."

(Photo Credit: Getty Images)
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