Foods that boost immune

Elderbery is a fruit rich in antioxidants and may also have the ability to fight inflammation.

Tea: Green or black? Both are loaded with disease-fighting polyphenols and flavonoids. These antioxidants seek out cell-damaging free radicals and destroy them. Caffeinated and decaf work equally well.

Cabbage: This is a source of immune-strengthening glutamine. And cabbage is easy and inexpensive to find during the winter months when it's in season. Try adding cabbages of any variety (white, red, Chinese) to soups and stews to sneak in extra antioxidants and boost your meal's nutritional value.

Acai Berry's dark color signals that it is high in antioxidants called anthocyanins which help your body fight aging and disease.

Oyster: Aphrodisiac? Immune boosters? Maybe both, thanks to the mineral zinc that's found in oysters. Low zinc levels have been associated with male infertility. And zinc appears to have some antiviral effect.

Broccoli: Easy to find at the grocery store and incorporate into meals, broccoli is an immune-boosting basic. One study reported a chemical in broccoli helped stimulate the immune systems of mice. Plus, it's full of nutrients that protect your body from damage. It has vitamins A, vitamin C, and glutathione. Add some low-fat cheese to round out a side dish with immune-enhancing B vitamins and vitamin D.

Garlic: Garlic offers several antioxidants that battle immune system invaders. Among garlic's targets are H. pylori, the bacteria associated with some ulcers and stomach cancer.

Grapefruit: Grapefruit is packed with flavonoids -- natural chemical compounds that have been found to increase immune system activation. They have a good amount of vitamin C too.

Low fat yoghurt: A daily cup may reduce your chances of getting a cold. Look for labels listing "live and active cultures." Some researchers believe they may stimulate your immune system to fight disease. Also look for vitamin D. Recent studies have found a link between low vitamin D levels and an increased risk of cold and flu.

Spinach: Known as a "super food," spinach is nutrient-rich. It has folate, which helps your body produce new cells and repair DNA. And it boasts fiber, antioxidants, such as vitamin C, and more. Eat spinach raw or lightly cooked to get the most benefit.

Button Mushroom has the mineral selenium and antioxidants. Low levels of selenium have been linked to increased risk of developing more severe flu. And the B vitamins riboflavin and niacin, found in these mushrooms, play a role in a healthy immune system. Animal studies have also shown mushrooms to have antiviral, antibacterial, and anti-tumor effects.

Almonds: A handful of almonds may shore up your immune system from the effects of stress. A recommended 1/4 cup serving carries nearly 50% of the daily recommended amount of vitamin E, which helps boost the immune system. And they have riboflavin and niacin, B vitamins that may help you bounce back from the effects of stress.

Sweet Potatoes: Like carrots, sweet potatoes have the antioxidant beta-carotene, which mops up damaging free radicals. Sweet potatoes also boast vitamin A, which is linked to slowing the aging process and may reduce the risk of some cancers.

Water melon: Hydrating and refreshing, ripe watermelon also has plenty of a powerful antioxidant, glutathione. Known to help strengthen the immune system so it can fight infection, glutathione is found in the red pulpy flesh near the rind.

Wheat germ: Wheat germ is the part of a wheat seed that feeds a baby wheat plant, so it is full of nutrients. It has zinc, antioxidants, and B vitamins among other vital vitamins and minerals. Wheat germ also offers a good mix of fiber, protein, and some good fat. Substitute wheat germ for part of the regular flour called for in baked goods and other recipes.