Tuesday 27 November 2007

Prostate Cancer and Diet - Part 3

BEVERAGES

Health Benefits of Tea

(HealthCastle.com) Tea is the most commonly consumed beverage in the world after water. Whether it is black, green or red (oolong) tea, they all contain polyphenols which give tea its antioxidant properties. Antioxidants may help protect our body from free radical damage. Indeed, tea ranks as high as or higher than many fruits and vegetables in the ORAC score, a score which measures antioxidant potential of plant-based foods.

Benefits of Tea

Numerous studies have demonstrated the anti-cancer properties of polyphenols. Some studies indeed suggested that tea's polyphenols may reduce risk of gastric, esophageal and skin cancers if one consumes 4 to 6 cups daily. Other laboratory studies have found that polyphenols help prevent blood clotting and lower cholesterol levels. A recent study published in December 2005 showed that just 2 cups of tea may lower the risk of ovarian cancer by 46 percent in women.

Tea: Black, green or red?

The more processing tea leaves undergo, the darker they will turn. Green tea is the least processed tea. They are simply steamed quickly. Black and red teas are partially dried, crushed and fermented. As we have mentioned before, regardless of the processing method, all teas contain polyphenols.

Tea: Caffeine content

According to the American Dietetic Association, a cup of tea contains an average of 40mg of caffeine, compared to 85mg as found in a cup of freshly brewed coffee.

What about Herbal Tea?

Black, green and red teas derive their leaves from a warm-weather evergreen tree known as Camellia sinensis. The leaves from this tree contains polyphenols. Herbal tea is not derived from this leaf and so does not have this particular health-promoting properties. Indeed, most herbal teas in the market are NOT tea at all. They are only infusions made with herbs, flowers, roots, spices or other parts of some plants. The proper term for this type of beverage is "tisane". Therefore, read the labels properly. Although tisane does not contain as much polyphenols, it does promote other various health qualities such as relaxation and calming effects.

What about Decaf Tea?

We do not know whether decaf teas have the same polyphenols, and thus the same health benefits. It is not yet known if removing caffeine also removes polyphenols in the decaffeinating process.

Alcohol and Cancer

What is the link between alcohol and cancer risk?

According to the expert report from the American Institute for Cancer Research, Food, Nutrition and the Prevention of Cancer: a Global Perspective, there is convincing evidence that alcohol increase the risk of cancer of the mouth, pharynx, larynx and esophagus. The risk of upper respiratory tract cancer is greatly increased if drinkers also smoke. Alcohol also increase the risk of liver cancer and probably increases the risk for colon, rectal and breast cancer.

How does drinking alcohol increase cancer risk?

When you drink alcohol, the sensitive tissues of your upper-respiratory tract are directly exposed to alcohol in beverages, causing damage to cells and possibly initiating cancer. Cancer of the liver is probably preceded by alcoholic liver cirrhosis which develops after years of drinking. There is less known about how drinking alcohol affects the development of other cancers.

What can I do to lower my cancer risk?

One thing you can do is choose not to drink alcohol, or choose to drink them only in moderation. That's no more than 2 drinks per day for men and 1 for women.

1 drink =

1 bottle or can of beer (12 oz)
1 small glass of wine (5 oz)
1 shot of 80 proof liquor (1.5 oz)


Why is the recommended limit different for women and men?

Alcohol affects women and men differently. A woman's body has more fat and less muscle than a man's. Alcohol can be diluted into water-holding muscle tissue, but not into fat tissue. Therefore alcohol cannot be diluted as quickly in her body as in his. Also, a woman cannot metabolize alcohol as quickly as a man. Therefore, alcohol stays in her bloodstream longer.

Does drinking present special risks for women?

The risk for developing breast cancer, the second most common cancer in women in the States, rises with increased alcohol consumption. Women at a high risk for breast cancer should consider not drinking. Women develop alcohol-related health problems, such as cirrhosis of the liver, faster then men who drink the same amount. Finally, alcohol can severely injure a pregnant woman's unborn child.

Is it true that drinking alcohol can lower my risk for heart disease?

There is evidence that drinking modest amounts of alcohol is associated with a lower risk for coronary heart disease in men, and perhaps women. For more details, read Red Wine - Health Benefits? However, drinking higher amounts of alcohol raises the risk of cancer along with risks for high blood pressure, stroke, heart disease, birth defects, inflammation of the pancreas, damage to the brain and heart, malnutrition, osteoporosis, accidents, violence and suicide. There are better ways to decrease your heart disease risk, including exercising, reaching and maintaining a healthy weight, lowering saturated fats and trans fats in your diet, controlling blood pressure and not smoking.

No comments: