Marcus Stout asked:


Cancer is a complex, devastating illness which is responsible for the deaths of millions of people each year. For decades, scientists have been attempting to uncover some of the secrets of cancer in order to find a cure. While, so far, a cure has been out of reach, there appear to be some natural remedies which can prevent or slow cancer growth. One of those remedies is a beverage which is commonplace in many Asian households-tea.

The History of an Anti-Cancer Tool

Tea has been a dietary staple for 500,000 years. People in India and China appear to be among the first to have enjoyed this beloved beverage. But it’s one variety in particular-Camellia sinensis-which appears to have a number of health benefits associated with it. That variety is also known as green tea.

What Makes Green Tea Special

Green tea is unique in that it is produced from unfermented leaves and it contains a high concentration of polyphenols, which are chemicals that can serve as antioxidants. Antioxidants are essentially on a search-and-destroy mission against free radicals, compounds which compromise DNA and destroy cells. Free radicals are often to blame for the development of cancer as well as heart disease. The antioxidants immobilize free radicals and inhibit the damage often associated with them.

Medicinal Uses of Green Tea

For years, Asians have used green tea to promote a healthy lifestyle. It helps to promote good digestion, improve concentration, and promote the excretion of urine. In addition, a number of studies in human beings, animals, and in laboratories suggest that green tea can be effective in combating a number of ailments.

Green Tea’s Effect on Cancer of the Pancreas and Colon

In an article entitled, “Green Tea Consumption and the Risk of Pancreatic and Colorectal Cancers,” researchers B.T. Ji, W.H. Chow, A.W. Hsing, J.K. McLaughlin, Q. Dai, Y.T. Gao, W.J. Blot, and J.F. Fraumeni, Jr. examined the question of green tea’s effectiveness as an antidote to certain types of cancers.

The Columbia University researchers conceded that the effect of green tea on cancer risk is uncertain, although a number of animal studies seem to indicate a positive effect.

In order to test the hypothesis that drinking green tea can, in fact, lessen cancer risk, the researchers conducted an extensive study in Shanghai, China in order to see whether green tea consumption had any impact on cancers of the colon, rectum, and pancreas.

The research team found that the greater the consumption of green tea, the lesser the risk of cancer. As a result, it appears that green tea may, in fact, lower the incidence of both colorectal and pancreatic cancers. Yet, it should be noted that other similar studies have produced conflicting results. As a result, scientists recommend additional research before a definitive statement can be made about green tea as a colorectal cancer prevention tool.

As far as pancreatic cancer is concerned, another study showed that those individuals who consumed the most green tea were far less likely to develop the disease. It appears that the reduced risk is most pronounced in women, who cut their pancreatic cancer rate in half by drinking large amounts of green tea.

In contrast, male green tea drinkers were 37 percent less likely to develop the disease. However, it should be noted that it is impossible to tell from this particular study whether green tea was solely responsible for cutting pancreatic cancer risk.

Green Tea and Other Cancers

But what about other cancers? How effective has green tea been in preventing other forms of the disease? To begin with, cancer rates are often lower in Japan and other nations where green tea consumption is high. Animal studies also indicate that the polyphenols in green tea are effective antioxidants which kill cancerous cells, stopping them in their tracks.

A study of bladder cancer patients found that those who consumed green tea had a much better five-year survival rate than cancer patients who did not drink the beverage. In addition, animal studies appear to confirm that the chemicals in green tea stop the growth of ****** cancer cells.

One study of nearly 500 women with ****** cancer found that those who drank green tea did not see their cancer spread as much as those who did not consume green tea. Yet, those who were in the later stages of ****** cancer who drank green tea saw little or no improvement in their condition.

Animal studies also indicate that green tea can prevent the growth of cancer cells in the esophagus. But studies in human beings have yielded mixed results. For instance, one study showed that green tea could help prevent esophageal cancer-especially in women, while another indicated that the tea could actually increase the incidence of such cancer.

Consequently, additional research is needed before scientists can determine conclusively whether green tea can act as a cancer preventative.

The effects of green tea on lung and prostate cancer remain unclear. However, the beverage does seem to prevent the onset of skin cancer. There is also some evidence to suggest that it can inhibit the growth of stomach cancer cells.

It appears that green tea may be effective in the fight against inflammatory bowel disease. This is significant because people who suffer from this disease are at a greater risk for colon cancer. Specifically, green tea appears to reduce the inflammation characteristic of ulcerative colitis and Crohn’s disease, two forms of inflammatory bowel disease.

Green Tea and Chemotherapy

There have been lab tests to indicate that green tea can improve the effectiveness of chemotherapy drugs such as doxorubicin and tamoxifen. But the positive effect has not yet been demonstrated in studies of human beings. In fact, green tea and green tea extracts are not recommended for prostate cancer patients who are undergoing chemotherapy.

The Final Word

Although scientific studies at this point are not altogether conclusive, there is strong evidence to suggest that green tea can be effective in preventing cancer. That may be particularly true for colorectal and pancreatic cancers. At this point, a number of doctors agree that, for most people, the health benefits of drinking green tea far outweigh the risks.

Marcus Stout asked:


It was reportedly discovered by a Chinese emperor some 40 centuries ago. And, legend has it, the discovery was purely by accident. But that coincidental discovery has improved the health of people around the world, who have turned to green tea in particular to help soothe their pains, improve their digestion, alleviate their depression, boost their immune system, and perhaps even lengthen their lives.

But what is it that makes green tea so beneficial to human health?

The Ingredients of Success

Green tea is actually made up of a variety of ingredients. These include caffeine, vitamins, minerals, and oils. However, the most important ingredients are the polyphenols, especially one called EGCG, which is believed to improve health.

In fact, it is the polyphenols which make green tea so much more effective than other beverages in fighting disease and illness.

Green Tea and Cholesterol

There have been some intriguing studies indicating that green tea can be effective in the fight against high cholesterol. Specifically, the beverage reduces “bad” cholesterol and boosts “good” cholesterol, improving an individual’s overall cholesterol profile.

In addition, green tea appears to lower overall cholesterol levels, helping to reduce one’s risk of developing heart disease.

Similarly, green tea enhances cardiovascular health by improving the consistency of platelets in the blood.

Researchers have also found that green tea appears to protect against oxygen-induced damage to bad cholesterol.

Drinking green tea also seems to enhance antioxidant processes in the bloodstream.

Effect of Green Tea on Blood Fats

In recent years, much attention has been focused on blood fats and the effects of diet and exercise on their consistency. In an interesting study conducted at the Department of Public Health at the National Defense Medical College in Saitama, Japan, researchers S. Kono, K. Shinchi, N. Ikeda, F. Yanai, and K. Imanishi investigated the impact of green tea consumption on blood fats, also known as serum lipids.

The study was published in an article entitled, “Tea Consumption and Serum Lipid Profiles: a Cross-Sectional Study in Northern Kyushu, Japan.”

Specifically, the researchers examined the correlation between green tea use and the serum lipid concentrations of more than 1300 men who underwent retirement health exams at the Self-Defense Forces Fukuoka Hospital between 1986 and 1988.

The researchers factored out variables such as alcohol use, use of tobacco, exercise levels, body mass index, and rank.

They then discovered that the more green tea a patient drank, the lower his serum cholesterol levels. Men who drank nine or more cups of tea each day had total cholesterol levels that were eight mg/dl lower than those who drank two or fewer cups a day.

The serum cholesterol levels seemed to also decrease for men who ate a great deal of rice and soy beans, and increase for those who ate more Western foods.

However, adjusting for these additional diet variables did not seem to affect the correlation between green tea use and total cholesterol levels.

Additional Evidence from the Animal Kingdom

It’s been said that there is a definite link between diet and exercise and coronary heart disease. Therefore, anything in the diet that improves serum lipid profiles should reduce the incidence of heart problems.

It’s also known that green tea contains phytochemicals that work to decrease serum cholesterol as well as triglycerides.

In one animal study, 45 rats were subjected to a variety of treatments, including green tea. The study showed that consuming green tea improved the serum lipid profile by reducing total cholesterol, bad cholesterol, and trans fats. In addition, liver fat content decreased in rats that received a large amount of green tea.

Other Positive Effects of Green Tea Drinking

The polyphenols found in green tea may have some additional positive health effects. For instance, a number of animal and test tube studies indicate that these chemicals may have a substantial anti-cancer effect, especially in inhibiting the spread of melanoma, or skin cancer cells.

Green tea has also been linked to a reduction in oral cancers and dental cavities.

In addition, green tea may stimulate the production of immune system cells.

As a result, it can help the body fight bacteria, leading to improved overall health. In fact, one study showed that drinking ten or more cups of green tea each day could improve blood test results, protecting the body against liver damage.

How Much Green Tea is Enough?

Of course, you might be wondering how much green tea must be consumed in order to have a positive impact on health. In Asian nations, the typical tea drinker consumes about three cups each day-enough to provide as much as 320 mg of polyphenols.

Nevertheless, some studies indicate as many as ten cups each day are needed in order to really make a difference in cholesterol levels and overall health.

Possible Side Effects

It should be noted that there can be some negative side effects associated with green tea consumption. While green tea is a relatively healthy drink, those who consume several cups of it each day may experience anxiety and insomnia brought on by the caffeine found in the beverage.

Drinking green tea may also lead to iron deficiencies, since iron absorption in women may be reduced as much as 26 percent when green tea is consumed with a meal.

In addition, some drugs can interfere with green tea’s positive effects. Therefore, before switching to a diet rich in green tea, it may be best to check with a physician to determine if such a diet is right for you.

Looking to the Future

The forecast for green tea appears to be bright-as far as public health is concerned. Study after study seems to indicate that green tea can reduce cholesterol levels, combat cardiac disease, boost the immune system, and reduce the risk of cancer.

While additional study is needed in order to effectively harness all the benefits of green tea, it appears, for the moment, that simply adding a few cups of the brew to your daily diet can yield impressive health benefits.