Foods That Fight Cancer™
Cranberries grow in northern bogs on low-lying vines, just above water. These bright red gems are native to North America and at one time whalers and mariners carried cranberries on their ships to prevent scurvy. Today you've probably heard claims that cranberry juice helps prevent urinary tract infections; though it appears to help some women, it is not a treatment. We do know that with their healthful nutrients and phytochemicals along with the rich color and flavor, cranberries make a great addition to any meal, not just at Thanksgiving.
What's in Cranberries?
Cranberries are good sources of vitamin C and dietary fiber. They're very high in antioxidant power,[3-5] most of which comes from phytochemicals:
- Flavonoids, including anthocyanins, proanthocyanidins and flavonols
- Ursolic acid
- Benzoic acid and hydroxycinnamic acid
Are frozen berries as high in antioxidant phytochemicals as fresh ones? - From AICR HealthTalk
Berry Popular: Foods at FNCE - From the AICR blog
Does any one berry offer more protection than others? - From AICR HealthTalk
Full Glossary for Foods That Fight Cancer
The Cancer Research
One serving of cranberries provides at least 10 percent of the recommended daily amount of vitamin C and fiber. Dietary fiber can act in several ways to lower cancer risk, including helping with weight control. (Excess body fat increases the risk of eleven different cancers, and dietary fiber can increase the feeling of fullness.)
What Current Evidence Shows: AICR/WCRF Expert Report and its Updates (CUP)
|Cranberries are fruits high in dietary fiber and vitamin C. After a systematic review of the global scientific literature, AICR/WCRF weighed the strength of the evidence linking these factors to lower risk for several cancers.|
|Source: Food, Nutrition, Physical Activity, and the Prevention of Cancer: A Global Perspective and the 2011 Continuous Update Project: Colorectal Cancer.|
|Diets high in:||CONVINCINGLY lower risk of the following cancers:|
|Foods containing dietary fiber||Colorectum|
|Diets high in:||PROBABLY lower risk of the following cancers:|
|Mouth, pharynx, larynx
|Foods containing vitamin C||Esophagus|
When comparing people with and without cancer, studies show that people who eat more fruit have a lower risk of several cancers.
Open Areas of Investigation: Laboratory Research
Laboratory research is abundant on vitamin C and many compounds in cranberries, such as flavonoids.
- Vitamin C protects cells' DNA by trapping free radicals and inhibiting the formation of carcinogens.
- In cell studies, cranberry extract and anthocyanins decrease free radical damage to DNA that can lead to cancer. They decrease growth and stimulate mouth, breast, colon, prostate, lung and other cancer cells to self-destruct. Cranberries' proanthocyanidins and ursolic acid also decrease growth and increase self-destruction of several types of cancer in cell studies. Research suggests that these compounds seem to work synergistically, providing more protection together rather than individually.
- In limited animal studies, those fed cranberries developed fewer and smaller cancers of several types when compared to animals not consuming cranberries. Cranberries also reduced inflammation and cancers' ability to invade other tissues. (Chronic inflammation increases the risk of several types of cancer.)
Open Areas of Investigation: Human Studies
Human studies have generally focused on the general category of fruits, with a handful of studies investigating cranberry juice.
- When comparing people with and without cancer, studies show that people who eat more fruit have a lower risk of several cancers, though often with significant individual variation. In a large population survey, people with diets higher in total flavonoids and anthocyanidins had lower levels of an indicator of inflammation.
- A few small, short-term studies show that drinking cranberry juice every day increases people's blood levels of vitamin C. But whether that increases people's overall antioxidant activity or helps protect against DNA damage is not clear. Research is ongoing.
In the Kitchen
- Choose fresh cranberries that are firm and unshriveled.
- Dried cranberries offer almost no vitamin C, but they are concentrated in antioxidant phytochemicals, including ursolic acid and proanthocyanidins. Choose those with no signs of mold or off-odors.
- Unlike most other berries, cranberries may be refrigerated for up to two months.
- For longer storage, freeze cranberries in the bag purchased or freezer storage bag.
- Store dried cranberries in an airtight container at room temperature for up to three months; check expiration date on packaged berries.
- Add dried cranberries to cereal, oatmeal or plain yogurt.
- Balance fresh cranberries’ tartness by mixing with other fruits, such as oranges, apples and pears for a relish or salsa.
- Experiment with cranberries added to whole grains such as brown rice, bulgur, barley, and quinoa or whole-wheat stuffing.
- Try fresh or dried cranberries as a colorful addition to a green or carrot salad.
- Enjoy the flavor contrasts by combining dried cranberries with vegetables like Brussels sprouts or with apples and red cabbage over pork.
- Add fresh, unthawed frozen or dried cranberries to waffles, pancakes, muffins and quick breads.
- Mix dried cranberries with nuts and other dried fruit to make trail mix.
- Add cranberries to baked apples or apple crisp.
Cranberry Sweet Potato Bread
- Canola oil spray
- 2 large eggs
- 3/4 cup light brown sugar, firmly packed
- 1/3 cup canola oil
- 1 cup mashed sweet potatoes, fresh baked or canned without syrup
- 1 tsp. vanilla extract
- 1/2 tsp. orange extract
- 1 cup all-purpose flour
- 1/2 cup whole-wheat flour
- 1/2 tsp. cinnamon
- 1/2 tsp. nutmeg
- 1/2 tsp. allspice or mace (optional)
- 1/4 tsp. salt
- 1 tsp. baking soda
- 1 cup chopped dried unsweetened cranberries
Preheat oven to 350 degrees. Lightly coat a standard loaf pan (8x4 or 9x5-inch) with canola spray and set aside.
In a medium bowl, whisk eggs, sugar, oil, sweet potatoes and extracts until well combined.
In a large bowl, sift together flour, spices, salt and baking soda. Make a well in the center of the dry mixture and add the wet sweet potato mixture. Mix until just moistened; do not over-mix or beat batter until smooth. Gently stir in cranberries.
Bake 50 to 60 minutes, or until tester comes out clean. Remove bread from oven and allow to cool 10 minutes on rack. Remove from pan and set back on rack to completely cool. Seal bread tightly in plastic wrap, then foil. Tightly wrapped in both, it can be refrigerated up to one week or frozen up to one month.
Makes 16 servings.
Per serving: 160 calories, 5 g total fat (<1 g saturated fat), 26 g carbohydrate, 2 g protein, 1 g dietary fiber, 130 mg sodium.
Do You Have a Question? Ask the Expert!
We’ve compiled a list of some of the most common questions we receive in our FAQ below. Have a question about diet and food and cancer prevention? Ask your question using this form. We will post some of the answers to the questions we receive that have the most benefit to the most people.
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Frequently Asked Questions (FAQ)
Which fruits and vegetables should I be eating?
Eat as many different vegetables and fruits as you can. Variety is the key to obtaining the many protective phytochemicals. Each vegetable and fruit has its own profile of health-promoting substances.
The phytochemicals found in cantaloupe are different from those in broccoli or leeks or cherries. Try to include a lot of colors on your plate. Aim to eat some bright red, green, orange, blue, purple and yellow vegetables and fruits each day.
Should I buy organic foods whenever possible?
There are many reasons to eat organic foods, but currently, there is no convincing evidence that shows a difference between organic and conventionally grown foods related to cancer risk. Studies show pesticide residues on conventionally grown foods are almost always within safety tolerance limits.
If you are concerned about pesticide residues and can afford to spend more, organic produce may be a choice for you. Eating generous servings of a large variety of veggies and fruits - whether organic or not will benefit your health. The advantages of including more vegetables and fruits in your diet outweigh the potential risks from pesticides.
Can grilled meats really cause cancer?
Lab studies show that exposing meats to direct flame, smoke and intense heat (like when you grill or broil) can cause the formation of carcinogens (cancer-causing substances). Cooking methods that involve less heat, such as microwaving, baking, steaming and poaching, do not promote the formation of these substances.
Several strategies you can use to cut carcinogen formation on meat include marinating, flipping frequently, removing excess fat from meat before cooking, and microwaving for part of the cooking time. So for delicious and healthful options, try grilling vegetables, veggie burgers and fruit slices and cut down on meat, fish and poultry.
- McKay, D.L. and J.B. Blumberg, Cranberries (Vaccinium macrocarpon) and cardiovascular disease risk factors. Nutrition reviews, 2007. 65(11): p. 490-502.
- Jepson, R.G. and J.C. Craig, Cranberries for preventing urinary tract infections. Cochrane database of systematic reviews, 2008(1): p. CD001321.
- U.S. Department of Agriculture, A.R.S., Oxygen Radical Absorbance Capacity (ORAC) of Selected Foods, Release 2. 2010.
- Wolfe, K.L., et al., Cellular antioxidant activity of common fruits. Journal of agricultural and food chemistry, 2008. 56(18): p. 8418-26.
- Borges, G., et al., Identification of flavonoid and phenolic antioxidants in black currants, blueberries, raspberries, red currants, and cranberries. Journal of agricultural and food chemistry, 2010. 58(7): p. 3901-9.
- World Cancer Research Fund / American Institute for Cancer Research, Food, Nutrition, Physical Activity and the Prevention of Cancer: a Global Perspective, 2007: Washington, DC. p. 82-113.
- Chatelain, K., et al., Cranberry and Grape Seed Extracts Inhibit the Proliferative Phenotype of Oral Squamous Cell Carcinomas. Evidence-based complementary and alternative medicine : eCAM, 2008.
- Ferguson, P.J., et al., A flavonoid fraction from cranberry extract inhibits proliferation of human tumor cell lines. The Journal of nutrition, 2004. 134(6): p. 1529-35.
- Liu, M., et al., Cranberry phytochemical extract inhibits SGC-7901 cell growth and human tumor xenografts in Balb/c nu/nu mice. Journal of agricultural and food chemistry, 2009. 57(2): p. 762-8.
- MacLean, M.A., et al., North American cranberry (Vaccinium macrocarpon) stimulates apoptotic pathways in DU145 human prostate cancer cells in vitro. Nutrition and cancer, 2011. 63(1): p. 109-20.
- Seeram, N.P., et al., Blackberry, black raspberry, blueberry, cranberry, red raspberry, and strawberry extracts inhibit growth and stimulate apoptosis of human cancer cells in vitro. Journal of agricultural and food chemistry, 2006. 54(25): p. 9329-39.
- Sun, J. and R. Hai Liu, Cranberry phytochemical extracts induce cell cycle arrest and apoptosis in human MCF-7 breast cancer cells. Cancer letters, 2006. 241(1): p. 124-34.
- Neto, C.C., J.W. Amoroso, and A.M. Liberty, Anticancer activities of cranberry phytochemicals: an update. Molecular nutrition & food research, 2008. 52 Suppl 1: p. S18-27.
- Pathak, A.K., et al., Ursolic acid inhibits STAT3 activation pathway leading to suppression of proliferation and chemosensitization of human multiple myeloma cells. Molecular cancer research : MCR, 2007. 5(9): p. 943-55.
- Kresty, L.A., A.B. Howell, and M. Baird, Cranberry proanthocyanidins induce apoptosis and inhibit acid-induced proliferation of human esophageal adenocarcinoma cells. Journal of agricultural and food chemistry, 2008. 56(3): p. 676-80.
- He, X. and R.H. Liu, Cranberry phytochemicals: Isolation, structure elucidation, and their antiproliferative and antioxidant activities. Journal of agricultural and food chemistry, 2006. 54(19): p. 7069-74.
- Seeram, N.P., et al., Total cranberry extract versus its phytochemical constituents: antiproliferative and synergistic effects against human tumor cell lines. Journal of agricultural and food chemistry, 2004. 52(9): p. 2512-7.
- Prasain, J.K., et al., Effect of cranberry juice concentrate on chemically-induced urinary bladder cancers. Oncology reports, 2008. 19(6): p. 1565-70.
- Hochman, N., et al., Cranberry juice constituents impair lymphoma growth and augment the generation of antilymphoma antibodies in syngeneic mice. Nutrition and cancer, 2008. 60(4): p. 511-7.
- Ferguson, P.J., et al., In vivo inhibition of growth of human tumor lines by flavonoid fractions from cranberry extract. Nutrition and cancer, 2006. 56(1): p. 86-94.
- Chun, O.K., et al., Serum C-reactive protein concentrations are inversely associated with dietary flavonoid intake in U.S. adults. The Journal of nutrition, 2008. 138(4): p. 753-60.
- Duthie, S.J., et al., The effects of cranberry juice consumption on antioxidant status and biomarkers relating to heart disease and cancer in healthy human volunteers. European journal of nutrition, 2006. 45(2): p. 113-22.
- Vinson, J.A., et al., Cranberries and cranberry products: powerful in vitro, ex vivo, and in vivo sources of antioxidants. Journal of agricultural and food chemistry, 2008. 56(14): p. 5884-91.
- Cranberry Marketing Committee. http://www.uscranberries.com/cranberries/bogs.html