Broccoli: contains vitamin A, C, E, antioxidants and fiber. A true immune booster! Almonds: have a lot of vitamins and healthy fats, and are a strong antioxidant. It’s your true ally to prevent colds this winter! Tea: green or black, it’s a powerful antioxidant and enhance immune functions. Citrus fruits: oranges, grapefruits or limes. They contain vitamin C, which is essential to fight infections and help build your immune system. Ginger: it decreases inflammation and is known to reduce a sore throat. Yogurt: it contains live and active cultures that boost your immune system. Turmeric: the famous spice has been used for decade as anti-inflammatory treatment.