1.Cruciferous vegetablesThe cruciferous family consists of broccoli, brussels, cauliflower, kale,cabbage and mustard. These vegetables contain high amount of beta-carotene, vitamins C and E, folate and calcium. All these are immune and enhancing nutrients that augment the body's ability to fight infections. Experts recommend eating at least one cruciferous vegetable every day, especially during winter.2.Citrus familyFruits be
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