Food and your immune system
Elderberry
A traditional remedy, extract from these dark berries appears to block flu viruses in test tube studies. And a few small studies involving people show it may help you recover more quickly from flu. However, scientists caution that further study is needed. The fruit itself is rich in antioxidants which some studies suggest have a health benefit, but more research is needed.
Button mushrooms
Don't dismiss the lowly mushroom as low in nutrients: it has the mineral selenium. Low levels of selenium have been linked to an increased risk of developing more severe flu. The B vitamins riboflavin and niacin, found in these mushrooms, may play a role in a healthy immune system. Animal studies have also shown mushrooms to have antiviral, antibacterial and anti-tumour effects.
Acai berry
Sometimes promoted as a "super food" along with produce like blueberries, the little acai berry's dark colour signals that it is high in antioxidants called anthocyanins. While the acai is not scientifically linked to specific disease or illness fighting ability, some studies suggest antioxidants may help you maintain immune health as you age. Acai berries can be found most often in juice or smoothie form or dried and mixed with muesli.
Oysters
Aphrodisiac? Immune boosters? Possibly both, thanks to the mineral zinc that's found in oysters. Low zinc levels have been associated with male infertility. Some studies suggest zinc may have an antiviral effect, although researchers can't explain why. However, they do know it is important for several immune system tasks including healing wounds.
Cabbage
This is another source of glutathione which studies suggest helps maintain the body’s immune system. And cabbage is easy and inexpensive to find during the winter months when it's in season. Cabbages can be added to any variety of soups and stews to sneak in extra antioxidants and possibly boost your meal's nutritional value.
Almonds
A handful of almonds may help shore up your immune system from the effects of stress. A 60 gram serving carries nearly 50% of the daily recommended amount of vitamin E, which helps maintain a healthy immune system. And they have riboflavin and niacin - B vitamins that studies suggest are good for the nervous system.
Grapefruit
Grapefruit has a good amount of vitamin C needed for a healthy immune system. It’s also packed with flavonoids - natural chemical compounds which may reduce damage to cell DNA and cell membranes. Don’t like grapefruit? Try oranges or tangerines. Grapefruit can interfere with some medicines – seek medical advice.
Wheat germ
Wheat germ is the part of a wheat seed that feeds a baby wheat plant, so it is packed with nutrients. It has zinc, antioxidants and B vitamins among other vital vitamins and minerals. Wheat germ also offers a good mix of fibre, protein, and some good fat. Substitute wheat germ for part of the normal flour in cakes, biscuits and other recipes.
Low fat yoghurt
A daily pot 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. Studies have found a link between low vitamin D levels and an increased risk of colds and flu.
Broccoli
Easy to find at the supermarket and incorporate into meals, broccoli is an immune system basic. One study reported a chemical in broccoli helped stimulate the immune systems of mice. Plus, it's full of nutrients that help maintain a healthy body. It has vitamin A, vitamin C and glutathione. Add some low-fat cheese to make a side dish with immune-enhancing B vitamins and vitamin D.
Related Reading
Medically Reviewed by Dr Rob Hicks on September 27, 2012
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REFERENCES:
The Journal of International Medical Research, Volume 32, Number 2: Randomized Study of the Efficacy and Safety of Oral Elderberry Extract in the Treatment of Influenza A and B Virus Infections
European Cytokine Network. Volume 12, Number 2, 290-6, June 2001, Recherches, The effect of Sambucol, a black elderberry-based, natural product, on the production of human cytokines: I. Inflammatory cytokines
Mary Katherine Schmidl, Theodore Peter Labuza Essentials of functional foods
Exp. Biol. Med. 2004;229:393-406 Mushrooms, Tumors, and Immunity: An Update
(Journal of Nutrition. 2000;130:1399S-1406S.) The Dynamic Link between the Integrity of the Immune System and Zinc Status
Proceedings of the Nutrition Society (2000), 59, 595–600 Glutathione and immune function
Judy Van de Water, Carl L. Keen, M. Eric Gershwin. The influence of chronic yogurt consumption on iImmunity. Journal of Nutrition. 1999;129:1492S-1495S.
Meydani SN, Ha WK. Immunologic effects of yogurt. American Journal of Clinical Nutrition 2000 Apr;71(4):861-72.
Epidemiology and Infection (2006), 134: 1129-1140 Epidemic influenza and vitamin D
Prog Food Nutr Sci. 1991;15(1-2):43-60. Folate status and the immune system.
(Journal of Nutrition. 2001;131:2248-2251.) Theaflavins in Black Tea and Catechins in Green Tea Are Equally Effective Antioxidants.
American Journal of Clinical Nutrition, Vol 60, 176-182, Vitamin A and E intakes and plasma concentrations of retinol, beta- carotene, and alpha-tocopherol in men and women of the Baltimore Longitudinal Study of Aging.
Wang, X. Journal of Medicinal Chemistry, March 9, 2011; vol 54: pp 809-816.
US Department of Agriculture: "Cabbage."
Beck, M. The Journal of Federation of American Societies for Experimental Biology, 2001.
Cleveland Clinic: "35 Power Foods."
Dayong, W. The Journal of Nutrition, June 2007.
Gorton, H. Journal of Manipulative Physiological Therapeutics, October 1999.
Heimer, K. Journal of the American Academy of Nurse Practitioners, May 2009.
Kim, H. The Journal of Allergy and Clinical Immunology, 2008.
Laaksi, I. The American Journal of Clinical Nutrition, 2007.
MedlinePlus: "Garlic."
Medscape CME: "Vitamin C May Be Effective Against Common Cold Primarily in Special Populations."
US National Institutes of Health, Office of Dietary Supplements: "Zinc."
Office of Dietary Supplements, US National Institutes of Health: "Vitamin E."
Oregon State University, Linus Pauling Institute Research Report: "All About E," "Antioxidant Activities of Flavonoids."
Pressman, A. Glutathione: The Ultimate Antioxidant, Macmillan, 1998.
University of Maryland Medical Center: "Glutamine."
USDA National Nutrient Database: "Nuts, almonds."
Wu, D. The Journal of Nutrition, 2007.
Zakay-Rones, Z. The Journal of International Medical Research, 2004.
This tool does not provide medical advice. See additional information:
THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general information purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the BootsWebMD Site. If you have a medical problem please contact your GP. In England call 111 or NHS Direct. In Scotland call NHS 24. In Wales, call NHS Direct Wales. In the case of medical emergencies, always dial 999.
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