The following 16 foods have been shown to boost the immune system:

1. Elderberry – This fruit is loaded antioxidants and has been shown as an anti-inflammatory as well.
2. Button Mushrooms – These grocery store standards are heavy in selenium and the B vitamins riboflavin and niacin.  Selenium has been shown to lessen the severity of flu.  Riboflavin and niacin are essential to a healthy immune system.
3. Acai Berry – The dark color of this berry comes from a nutrient called anthocyanin.  As such, it has essential antioxidants.
4. Oysters  – Oysters are high in zinc.  Zinc helps to create and activate white blood cells that help the immune response. It also assists in healing wounds and fights viruses.
5. Watermelon– Watermelon, especially the red fleshy part near the rind contains the antioxidant glutathione which fights infections.
6. Wheat germ  – This is the part of the wheat seed that nourishes the baby wheat plants.  It is an excellent source of zinc, antioxidants and B vitamins.  It also provides fiber, protein and the tiniest bit of healthy fat.
7. Yogurt– The probiotics found in yogurt with live and active cultures reduces the severity of colds.  If the yogurt has Vitamin D, this also has been shown to help.
8.  Spinach – This superfood is chocked full of nutrients including folate which helps the body to repair the body’s cells and create DNA  It is, also high in Vitamin C.
9. Tea – Enjoyed around the world, this tasty beverage provides polyphenols and flavonoids.  These seek out cell-damaging free radicals and destroy them.
10. Sweet Potato – These tubers contain beta-carotene which becomes vitamin A, and cleans up damaging free radicals. The result is a bolstered immune system.  Rumor has it that it may improve the aging process
11. Broccoli  – This vegetable is high in vitamins A and C, and the antioxidant glutathione.
12. Garlic– Real garlic, especially in the raw form, helps beat skin infections thanks to its ability to fight bacteria, viruses, and fungi. It may even help lower bad cholesterol.
13. Miso– This fermented soybean is a good source for probiotics.
14. Chicken Soup – Hard science supports that Grandma’s chicken soup really does ease your cold symptoms and gets a body well sooner. Among other ingredients, it contains a chemical called carnosine which provides protection from the flu virus.
15. Pomegranate Juice – Since the days of the ancient Egyptians, this juice has been shown to help the body fight bacterial infections as well as viruses.
16. Ginger – Last but not least, it is best to skip the supplements and incorporate ginger directly into stir fries and other ways of directly eating it for the best delivery of antioxidants.