Download presentation
Presentation is loading. Please wait.
Published byLouisa Harvey Modified over 9 years ago
3
http://www.naturalhealthcarestore.com/ 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 http://www.teekampagne.de/
5
White Tea Picked before leaf buds fully open Leaves are bigger and lighter Air dried 3X antioxidants as green tea http://en.wikipedia.org/wiki/
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 http://www.farawayholidays.co.uk /faraway/cameron_highlands/
10
Not from Camellia Sinensis Made from Seeds Roots Flowers Other parts of plants and herbs http://www.northeastcoffeeco.com/
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 http://www.ncausa.org
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
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.