Anti-Cancer Superfoods Really Work
>> Thursday, February 5
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Turmeric. The orange-yellow spice turmeric, best known for its role in Indian curries and other Asian dishes, fights cancer because of an active ingredient, curcumin, that's a powerful antioxidant. Researchers at Ohio State University in Columbus reviewed numerous animal studies and concluded that curcumin demonstrated anti-cancer effects at virtually all stages of tumor development. Researchers in France and Britain also have been studying curcumin's action in the laboratory and concluded that it prevents and slows tumor cell growth. Watch out, though; according to the American Cancer Society, turmeric made certain anti-cancer drugs less effective when studied in animals and test tubes. Cancer patients shouldn't add a lot of turmeric to their diets or take curcumin supplements without talking to their doctors first.
Green Tea. One of the first plant-based chemicals to be studied for its anti-cancer properties, catechins -- the chemicals in green tea -- have been known for some time to prevent and reduce recurrence of breast and other cancers. With this particular chemical, experts even know why: a chemical known as EGCG inhibits breast tumor growth, a University of Mississippi study shows. Just two cups a day is enough to do the trick.
Blueberries, Acai Berries, Raspberries, and Cranberries. The rich, dark colors of blueberries, Brazilian acai berries, raspberries and cranberries come from phytochemicals that protect against numerous types of cancer. Most recently, researchers at the University of Florida found that the active ingredient in acai berries destroyed cancer cells when tested in cell cultures. And blueberries and muscadine grapes contain compounds that recent research shows cause cancer cells in the liver to self-destruct. In studies particularly important to women, cranberries have recently been discovered to be an important weapon in the fight against deadly ovarian cancer. Studies reported at the annual meeting of the American Chemical Society found that ovarian cancer cells that were becoming resistant to platinum chemotherapy -- the standard of care for ovarian cancer -- became six times more sensitive when exposed to a compound in cranberries. The anti-cancer properties of all these berries are so strong that researchers have been developing concentrated supplements and other products such as purees and concentrates.
Tomatoes. Harvard researcher Edward Giovannucci reviewed 72 different studies published by the National Cancer Institute, and concluded that lycopene, the active chemical in tomatoes, lowered the risk of many different cancers, particularly prostate, breast, lung and colon cancer. Subsequently, the FDA conducted a review of its own and disagreed, refusing food companies' request to label tomato products with an anti-cancer health promotion message. However, many experts believe the FDA's process was flawed and that tomatoes will be vindicated by further studies. The good news: cooking tomatoes seems to enhance the effects of lycopene, qualifying tomato-based spaghetti sauce as a nutritional powerhouse.
Soy. The active ingredient in soy is genistein, which is a phytoestrogen that protects against hormone-dependent cancers. It's also a powerful inhibitor of several proteins that are implicated in the uncontrolled growth of cancer cells. To get the anti-cancer benefits of soy, you need to consume about 50 grams per day of the whole food, such as raw fresh soybeans, known as edamame, dry roasted soybeans, or tofu. The research to date shows that supplements containing isoflavones don't work with the same action as soybeans themselves and in fact can be bad for you rather than good.
Watercress and Spinach. Researchers in Ireland released studies in the past two years showing that eating watercress everyday can prevent the DNA damage that leads to cancer. Research published in the American Journal of Clinical Nutrition – but conducted in Ulster where people are more comfortable eating watercress -- found that antioxidants in the nutrient-rich greens prevented free radicals from damaging healthy cells. Spinach, which we're all more familiar with, is also a cancer-fighter; research conducted by the M.D. Anderson Cancer Center in Texas showed spinach to protect against bladder cancer. The chemical that gives spinach its dark green color, chlorophyllin, proved to reduce the risk of liver cancer in research by the National Academy of Sciences. Who cares about muscles? Here's a much more important reason to eat your greens.
The Bottom Line
A great resource for those interested in learning more about making dietary changes to prevent cancer or cancer recurrence is a new book, AntiCancer: A New Way of Life by David Servan-Schreiber, an MD, PhD, and professor of psychiatry at the University of Pittsburgh School of Medicine. At the age of 31, Servan-Schreiber, one of the founders of Doctors Without Borders, had a brain tumor surgically removed. After exploring the research on the connections between diet and cancer, Serban-Schreiber embarked on a series of lifestyle changes that he credits with preventing his brain cancer from recurring. Two books by nutritional biochemist Richard Beliveau, Foods That Fight Cancer and Cooking with Foods That Fight Cancer, provide specific lists of foods and cooking suggestions that make following an anti-cancer diet straightforward and simple. (Caring.com)