Health benefits of green tea

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Health benefits of green tea

  1. 1. K. M. Jayasingha Department of Food Science and Technology Univesity of Peradeniya
  2. 2. • Tea plant is Camellia sinensis. • Tea likely originated in China. • Tea is an aromatic beverage. • Tea has a cooling, slightly bitter, and astringent flavour. 2
  3. 3. • Green tea • Black tea • Oolong tea • White tea • Pu-erh tea 3
  4. 4. • Green tea has greenish-yellow colour and slightly astringent flavor. • Green tea has a too high content of polyphenols. • Green tea is a medicine and a healthful beverage. 4
  5. 5. Tea leaves Partial withering steaming Rolling and drying Final frying Green tea 5
  6. 6. • Proteins • Carbohydrates • Lipids • Vitamins • Pigments • Volatile compound • Minerals • Xanthic bases • Polyphenol compounds 6
  7. 7. • The caffeine content is lower than other drinks. • Green tea contains antioxidant compounds. • Minerals in green tea play major role to increase nutritive value. 7
  8. 8. • Antioxidant activity • Antimutagenic and anticarcinogenic potential • Anti-hypertensive effect and cardiovascular disease risk • Oral health • Solar ultraviolet protection • Body weight control • Glucose tolerance and Insulin sensitivity 8
  9. 9. • Green tea is a source of antioxidant nutrients. • Green tea is rich in polyphenols. • Catechins and garllic acid are major polyphenols in green tea. • It protect against oxidative damage in body. 9
  10. 10. • Green tea polyphenols increase antimutagenic activity of green tea. • Green tea inhibit many cancers in the body. They are, • Lung cancer • Breast cancer • Ovarian cancer • Stomach cancer • Skin cancer 10
  11. 11. • Green tea reduces blood pressure. • Green tea reduces cardiovascular disease risk. • The oxidation of LDL-cholesterol is inhibited by green tea. • Green tea increases the levels of HDL- cholesterol. 11
  12. 12. • Green tea consumption reduces dental caries. • Green tea is a natural source of Fluoride. • Fluoride prevents tooth loss and oral cancer. • Catechin is a protector agent against some types of radiation. • It prevents skin disease, photoaging and potential cancer problems. 12
  13. 13. • Polyphenols has a potential to control body weight. • Green tea has an effect on glucose tolerance and insulin sensitivity and green tea increases insulin activity. 13
  14. 14. • The negative effects of caffeine Theophylline are nervousness, sleep disorders, vomits, headaches, epigastric pain, tachycardia. • Green tea should not be taken by some patients suffering heart problems. 14
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