1, lipid reduction and weight loss, to prevent cardiovascular disease. The relationship between tea and weight loss is very close, "Shennong Materia Medica" book as early as two thousand years ago has been mentioned in the weight loss effect of tea: "long service peace of mind and benefit gas ...... light body does not age". Modern scientific research and clinical trials have confirmed that tea can reduce blood lipids and cholesterol in the blood, so that the body becomes lighter, this is because the tea phenolic derivatives, aromatic substances, amino acids, vitamins, substances, the results of the integrated coordination, especially tea polyphenols and theophyllin and vitamin C's integrated role in the promotion of fat oxidation, to help digestion, lipid reduction and weight loss. In addition, tea polyphenols can dissolve fat, while vitamin C can promote cholesterol out of the body. Green tea itself contains theophylline, theophylline is to improve the toughness of blood vessels, so that blood vessels are not easy to rupture. The American Heart Association "Circulation" magazine published in May 2002, the results of a study showed that regular consumption of tea helps to reduce the risk of death due to heart disease. Researchers at Harvard Medical School in the United States*** followed up on 1,900 heart disease patients, who were mainly over the age of 60, and found that those patients who drank an average of more than 14 cups of tea a week had a risk of dying about three and a half years after their heart attack that was 44% lower than patients who did not drink tea. The study also showed that even if patients drink an average of less than 14 cups of tea per week, it is possible to reduce the death rate from heart disease by 28%. 2, cancer prevention. Green tea contains ingredients --- tea polyphenols and caffeine, the two produced by the combined effect, in addition to play a refreshing, nourishing effect, but also has to improve the body's immune system and anti-cancer effects. In recent years, the American Chemical Society General Association found that tea not only on the digestive system cancer has the effect of inhibition, but also on the skin and lung, liver cancer also has an inhibitory effect. After scientific research confirmed that tea in the organic anticancer substances are mainly tea polyphenols, theophylline, vitamin C and vitamin E; tea inorganic anticancer elements are mainly selenium, molybdenum, manganese, germanium and so on. Chinese and Japanese scientists believe that the catechins in tea polyphenols have the best anti-cancer effect. 3、Anti-toxic sterilization. Tea as a detoxification medicine can be traced back to ancient Shennong era (about 2737 BC), "Shennong tasted a hundred herbs, the day met seventy-two poisons, tea and the solution," said in the "Records of the Grand Historian - Three Emperor's Records", "Huainan Zi - Xiuwu training," "Diffraction of the Cultivation of Materia Medica," and other books have been recorded. Tea Sage Lu Yu in his "Tea Classic" more than 1,200 years ago (780 AD) the world's first authoritative work on tea in the "Tea utility", pointed out that: "Tea is cold, best used as a beverage ...... such as When you feel hot, thirsty, stuffy, brain pain, tired eyes, fatigue of the limbs, joint discomfort, drink four or five mouthfuls of tea to show the effect. The above symptoms listed by Lu Yu are close to typical pneumonia or suspected cases. Chen Zangqi, a Tang Dynasty medical practitioner, wrote in Gleanings from the Materia Medica, "Quench thirst and remove epidemics. Noble tea is also." Famous eunuch Liu Zhenliang in the "tea ten virtues" in the "tea in addition to plague" as one of the tea virtues. Since the Tang Dynasty, the successive generations of tea therapy, there are new similar to tea detoxification sterilization narrative, but due to the underdevelopment of science at that time, will have a strong contagious and epidemic diseases collectively referred to as "plague" or "plague", although not pointing out what kind of bacteria, viruses, but drinking tea can help Anti-toxic sterilization has been confirmed. Recent medical research on the health effects of tea continues to deepen, U.S. scientists in 2003 in the "Proceedings of the National Academy of Sciences" reported: "Tea called 'theanine' chemical substances can make the body's ability to fight off infections by five times". 4, longevity. Green tea on the human body's anti-aging effect is mainly reflected in a number of effective chemical components and a variety of vitamins on the coordinated role, especially tea polyphenols, caffeine, vitamin C, aromatics, lipopolysaccharides, etc., can enhance the body's cardiovascular activity and vascular elasticity, inhibit atherosclerosis, reduce hypertension and coronary heart disease incidence, enhance immunity, and thus anti-aging, so that people get a long life. According to medical research, tea polyphenols in addition to reducing blood cholesterol and triglyceride content, but also enhance the toughness and elasticity of the microvessels, reduce blood lipids, which is extremely useful in the prevention and treatment of hypertension and cardiovascular and other common diseases of middle-aged and elderly people. Tea contains selenium, and organic selenium, selenium is more easily absorbed than grain and oil, the United States Dr. Richard Pai Xi Watt believes that: selenium added to food with vitamin C, vitamin E with a triple agent, can extend the life of people, and tea is rich in these life-affirming elements of the strange.