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 All tea comes from plant Camellia Sinensis  White  Green  Oolong  Black  Type of tea is determined by:

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Presentation on theme: " All tea comes from plant Camellia Sinensis  White  Green  Oolong  Black  Type of tea is determined by:"— Presentation transcript:



3  All tea comes from plant Camellia Sinensis  White  Green  Oolong  Black  Type of tea is determined by:  When harvested  Amount of oxidation  Process undergone

4  China  India  Japan  Sri Lanka  Taiwan

5  White Tea  Picked before leaf buds fully open  Leaves are bigger and lighter  Air dried  3X antioxidants as green tea

6  Green Tea  Undergone minimal oxidation during processing 5-40% oxidized Heat immediately through steam or dry cooking pans Processed within one to two days of harvesting

7  Oolong Tea  Oxidized more than green tea and less than black tea  Oxidized two to three days

8  Black Tea  Leaves completely oxidize  Oxidized between two weeks and one month

9  Composition varies according to: Growing season Strain or variety Storage Brewing conditions /faraway/cameron_highlands/

10  Not from Camellia Sinensis  Made from  Seeds  Roots  Flowers  Other parts of plants and herbs

11  Polyphenols  Catechins Powerful antioxidants Slow oxidative damage to cells White and green tea contain highest levels of ECGC Least processed  Theaflavins and Thearubigins (1,2) Highest in oolong and black tea More processed


13  Women in Shanghai China  20-74 years of age  3454 cancer cases  3474 control  Participants interviewed for:  Initial age of tea drinking  Amount consumed  Brew strength  Quality of tea

14  Results  Regular green tea drinkers had 12% lower risk for breast cancer  Green tea drinking for <6 years associated with significantly reduced risk among postmenopausal women  Amount of dry tea leaves consumed per month showed trend toward decreased risk in premenopausal women Conclusion Green tea may be weakly associated with a decreased risk of breast cancer

15  Majority of research suggests a modest reduction in risk of developing breast cancer with green tea consumption  More than 3 cups of green tea per day slightly reduced risk of breast cancer recurrence in women with breast cancer

16  22 studies reviewed  Green tea and black tea consumption with lung cancer risk  Results  Green tea consumption of two cups/day associated with 18% decreased risk of lung cancer  No protective effect for black tea

17 The evidence was too limited in amount, consistency, or quality to conclude a role for tea in cancer



20  Brewed drink  Prepared from roasted seeds of the coffee plant  Grows on shrubs, or small trees  Pit inside red or purple fruit  Known for high caffeine content

21 Hawaii Colombia Puerto Rico Guatemala Brazil Mexico Indonesia Kenya

22  Diterpenes:  Cafestol and Kahweol Anticarcinogenic properties

23  Polyphenols  Lignins  Flavonoids Anticarcinogenic properties  Chlorogenic acid  Slows release of glucose Effect on insulin sensitivity  Antioxidant

24  More than 3 cups of coffee per day slightly increased risk of gastric cardia cancer, but not non-cardia cancer  More than 3 cups of coffee per day had no affect on risk of cancer of the pharynx, larynx, or esophagus

25  Consumption of caffeinated coffee had no affect on colon or rectal cancers in men or women  Consumption of two cups of decaffeinated coffee significantly reduced risk of colon and rectal cancers in both men and women




29 ProductCaffeine (mg) Hershey’s Milk Chocolate, 1 bar9 Arizona Green Tea, 1 bottle15 Generic instant mix, unsweetened, 1 tsp27 Hershey’s Dark Chocolate, 1 bar31 Coca-Cola Classic, 1 can35 Average cup of black tea40-100 Mountain Dew, 1 can54 Starbucks Espresso, 1 shot58-75 Red Bull, small can76 5-hour Energy Shot, 2 oz bottle80 Grande Starbucks Tazo Chai Tea Latte100 Excedrin, Extra Strength, 2 tablets130 Grande Starbucks Vanilla Latte 150 Monster Energy, 16 oz can160 Average cup of coffee100-200

30  Stimulates central nervous system  Makes you more alert and boosts energy  Used in pain relievers  Too much can cause:  Restlessness  Anxiety  Irritability  Headaches  Withdrawal symptoms 500-600 mg per day is considered to be safe

31  Factors affecting caffeine response  Body mass  Age  Smoking habits  Drug or hormone use  Stress

32  No correlation between soft drink consumption (>1 can per day) on cancers of the mouth, pharynx, larynx, esophagus or stomach  High sugar content of soft drinks may lead to increased body fat that would increase risk of some cancers

33  No increased risk and potentially decreased risk of cancer associated with coffee and tea consumption  Further research needed  Coffee and tea are healthy beverages  Monitor caffeine and sugar content of beverages

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