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Cancer | For Some, Drinking Tea May Lower Cancer Risk
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Long-term tea consumption reduced the risk of all digestive system cancers by 27 percent.

For Some, Drinking Tea May Lower Cancer Risk

Women who drink tea regularly might have a lower chance of developing digestive system cancers, says a study in the American Journal of Clinical Nutrition.

It’s in the leaves

Tea is widely regarded for its potential health benefits, which range from cholesterol-lowering effects to diabetes and cancer prevention. Tea leaves are rich in polyphenols called catechins — antioxidant compounds that may prevent DNA damage and inhibit tumor cell growth, invasion and blood vessel formation. The best-known tea catechin is called epigallocatchin-3-gallate, or EGCG.

Protect your tummy with tea

Several analyses have suggested that tea might protect against gastrointestinal cancers, but others have failed to find an effect. To see if tea drinking affected the risk of digestive system cancers in women, researchers studied 69,310 Chinese women for 11 years as part of the Shanghai Women’s Health Study.

Over the course of the study, 1,255 gastrointestinal cancers were diagnosed in the women, including cancers of the esophagus, pancreas, stomach, colon and rectum, gallbladder and bile duct, and liver.

  • Women who drank tea three or more times per week for 6 or more months in a row had a 14 percent lower risk of developing gastrointestinal cancers than women who never drank tea.
  • Drinking more tea was associated with even greater benefit; women who drank two to three cups of tea per day had a 21 percent lower risk of all digestive system cancers.
  • Long-term tea consumption (for 20 years or more) reduced the risk of all digestive system cancers by 27 percent and colorectal cancer by 29 percent.
  • Tea consumption seemed to be most protective against esophageal, stomach and colorectal cancers.

Green tea was the most common type consumed by the women.

Gastrointestinal cancers account for about 50 percent of cancer deaths among Chinese women. While death rates for these cancers are lower in other parts of the world, many digestive system cancers may go undetected until they have spread, making prevention that much more important.

To help lower your risk of gastrointestinal cancers,

  • Don’t smoke. Smoking increases the risk for many cancers, including colorectal, liver, pancreatic, esophageal and stomach cancers. 
  • Get tested. Regular screening for colorectal cancer can help lower your risk of dying from the disease.
  • Know your history. Having a first-degree relative with certain cancers may increase your risk of developing the same cancer. Your doctor may adjust the frequency or type of cancer screening based on this knowledge.
  • Watch your diet. Drinking alcohol, eating salty, fatty, cured or pickled foods, and not getting enough fiber in your diet might increase your chances of developing some digestive system cancers.
  • Maintain an ideal weight. Obesity is linked to several different cancers. Reach your target weight by eating a diet rich in fresh fruits and vegetables, lean protein, whole grains and legumes, and by getting daily exercise.

(Am J Clin Nutr 2012;96:1056–63)

Kimberly Beauchamp, ND, received her doctoral degree from Bastyr University, the nation’s premier academic institution for science-based natural medicine. She co-founded South County Naturopaths in Wakefield, R.I., where she practiced whole family care with an emphasis on nutritional counseling, herbal medicine, detoxification and food allergy identification and treatment. Her blog, Eat Happy, helps take the drama out of healthy eating with real food recipes and nutrition news that you can use. Dr. Beauchamp is a regular contributor to Healthnotes Newswire.

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The health information contained in this site is not intended as medical advice and should not be considered a substitute for appropriate medical care. Any products mentioned in studies cited in Healthnotes articles are not necessarily endorsed by Bastyr. As with any product, consult with a natural health practitioner to discuss what may be best for you.

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