Benefits of Green tea

Benefits of Green tea

Green tea is a type of tea made solely with the leaves of Camellia sinensis that has undergone minimal oxidation during processing. Green tea originates from China and has become associated with many cultures in Asia from Japan to the Middle East. Recently, it has become more widespread in the West, where black tea is traditionally consumed. Many varieties of green tea have been created in countries where it is grown. These varieties can differ substantially due to variable growing conditions, processing and harvesting time.

Over the last few decades green tea has been subjected to many scientific and medical studies to determine the extent of its long-purported health benefits, with some evidence suggesting regular green tea drinkers may have lower chances of heart disease and developing certain types of cancer. Green tea has also been claimed as useful for "weight loss management"

Tea consumption had its origin in China more than 4000 years ago. Green tea has been used as both a beverage and a method of traditional medicine in most of Asia, including China, Japan, Vietnam, Korea, India and Thailand, to help everything from controlling bleeding and helping heal wounds to regulating body temperature, blood sugar and promoting digestion.

The Kissa Yojoki (Book of Tea), written by Zen priest Eisai in 1191, describes how drinking green tea can have a positive effect on the five vital organs, especially the heart. The book discusses tea's medicinal qualities, which include easing the effects of alcohol, acting as a stimulant, curing blotchiness, quenching thirst, eliminating indigestion, curing beriberi disease, preventing fatigue, and improving urinary and brain function. Part One also explains the shapes of tea plants, tea flowers, and tea leaves, and covers how to grow tea plants and process tea leaves. In Part Two, the book discusses the specific dosage and method required for individual physical ailments.

Ancient Chinese people knew the benefits of green tea for health. They have always used it for medical purposes. However, in Ancient China, it was used especially against the headaches and depression. Green tea has a great importance in China history. It is produced from the leaves of Camellia Sinensis by some special processes. Unlike black tea, it has little amount of caffeine which causes to insomnia, nausea and frequent urination.

The secret of green tea lies in the fact it is rich in catechin polyphenols, particularly epigallocatechin gallate (EGCG). EGCG is a powerful anti-oxidant: besides inhibiting the growth of cancer cells, it kills cancer cells without harming healthy tissue. It has also been effective in lowering LDL cholesterol levels, and inhibiting the abnormal formation of blood clots. The latter takes on added importance when you consider that thrombosis (the formation of abnormal blood clots) is the leading cause of heart attacks and stroke.

Links are being made between the effects of drinking green tea and the "French Paradox." For years, researchers were puzzled by the fact that, despite consuming a diet rich in fat, the French have a lower incidence of heart disease than Americans. The answer was found to lie in red wine, which contains resveratrol, a polyphenol that limits the negative effects of smoking and a fatty diet. In a 1997 study, researchers from the University of Kansas determined that EGCG is twice as powerful as resveratrol, which may explain why the rate of heart disease among Japanese men is quite low, even though approximately seventy-five percent are smokers.

Why don't other Chinese teas have similar health-giving properties? Green, oolong, and black teas all come from the leaves of the Camellia sinensis plant. What sets green tea apart is the way it is processed. Green tea leaves are steamed, which prevents the EGCG compound from being oxidized. By contrast, black and oolong tea leaves are made from fermented leaves, which results in the EGCG being converted into other compounds that are not nearly as effective in preventing and fighting various diseases.

This is the list of benefits that may be obtained by drinking green tea
1. It is used to treat multiple sclerosis.
2. It is used for treatment and prevention of cancer.
3. It is used to stop Alzheimer’s and Parkinson’s diseases.
4. It is used to raise the metabolism and increase fat oxidation.
5. It reduces the risk of heart diseases and heart attacks by reducing the risk of trombosis.
6. It reduces the risk of esophageal cancer.
7. Drinking green tea inhibits the growth of certain cancer cells, reduces the level of cholesterol in blood, improves the ratio of good cholesterol to bad cholesterol.
8. It is used to treat rheumatoid arthritis and cardiovascular diseases
9. It is used to treat impaired immune function. .
10. Some researches show that, drinking green tea regularly may help prevent tooth decay by killing the bacteria which causes the dental plaque.

Some Possible Side Effects
Some green tea lovers commonly restrict their intake because of the stimulants it contains — equivalent to about a third the amount of caffeine as is found in coffee. Too much caffeine can cause nausea, insomnia, or frequent urination.

References:
http://healthmad.com/alternative/10-great-benefits-of-drinking-green-tea/

http://en.wikipedia.org/wiki/Green_tea

http://chinesefood.about.com/library/weekly/aa011400a.htm