Green Tea
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Overview

Green tea is well known for its many health benefits. However, five or more cups of green tea is necessary to receive all the health protection that it offers. Green tea is available in many other forms, not just as a beverage. One can get green tea capsules or supplements - for a busy person, this may be just what you need, and will allow you to gain all the nutritional and medicinal benefits of the green tea simply by swallowing a pill.

Green tea capsules have a multitude of beneficial effects on the body. These include the ability to lower cholesterol levels and control high blood pressure, slowing the progression of arthritis, and protecting against cardiovascular diseases. The powerful antioxidants that green tea contains act to protect DNA from damage by harmful free radicals that may be increased by air pollution or other toxins. Green tea capsules help with weight loss as well, as the green tea jump-starts the metabolism and helps it to burn more calories and fat.

Studies show that green tea capsules may even help to prevent a number of types of cancer, including breast cancer and liver cancer. In the case of breast cancer, it prevents the growth and spreading of cancer cells, and contains chemicals that stop the chemical estrogen from acting to stimulate cancer cells. For much the same reasons, green tea capsules are often used to treat menopause as well. Research demonstrates that the use of green tea capsules helps to lessen the effects of menopause for women who use them.

As early as 1994 an article published by the Journal of the National Cancer Institute showed that a regular diet that included green tea could reduce the risks of esophageal cancer by as much as 60%. The study found that certain compounds found in green tea tended to inhibit the growth of cancer cells. Apparently it's the fact that green tea is high in an anti-oxidant known as "epigallocatechin gallate", or EGCG for short. Clinical tests show that EGCG not only inhibits the growth of new cancer cells, but it kills some existing cancer cells without harming normal cells.

 
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Green Tea Extract Benefits
There are many health benefits of green tea extract, below is a quick list highlighting some of them:
arw Green tea leaf extract contains EGCG, a powerful antioxidant 200 times more potent than vitamin E


arw Its rich in bioflavonoid, and protects against digestive and respiratory infections


arw It has thermogenic effects that aids in weight loss without causing jitters or other unwanted side effects


arw Green tea extract helps decrease hormone activity and is an effective treatment for acne


arw Green tea leaf is anti bacterial, helps lower cholesterol, reduces inflammation, and lowers blood pressure


arw It also help prevent some forms of cancer including colon, pancreatic, and stomach cancer


arw Green tea extract stimulates the immune system, and also helps defend against dental plaque
  Green tea extract also protects against liver damage
arw Some new research suggests green tea may help prevent liver transplant failure in patients
 

The Good Things about Taking Green Tea Capsules
Just like any green tea products, the capsules are also enriched with antioxidants that fight cancer causing free radicals inside the body. Yet compared to the liquid form, it is proven via many researches that drinking the capsules will emit higher antioxidant activity in the body after taking it for a matter of eight hours
1. Weight Loss Aid
Green tea capsules also helps in faster weight loss as it contains elements that triggers the body’s ability to burn fats swiftly. Metabolism is also heightening when having green tea pills, hence you shed calories faster.
2. Improved Insulin Sensitivity
Individuals suffering from diabetes will benefits from drinking this capsule as it is believed to boost one’s insulin sensitivity.
3. Cholesterol Level
Avoid the possibility of encountering heart attacks by having capsules made from green tea as they lower cholesterol levels in the body. Also, it can stop migraines and stomach problems.
4. Reduce Plaque
This one may sound surprising but drinking green tea supplements is also known to reduce plaque bacteria on the teeth. Lesser plaque means lower cavities, hence you avoid tooth decays and other problems associated with it.

Dosage
Green tea extracts in capsule form are recommended for daily dosages of 100 to 150mg three times daily.

Side-Effects
Generally, green tea has little or no side-effects. However, it does contain caffeine, and individuals with conditions that may be complicated by caffeine intake should consult a medical expert before using green tea extracts. Pregnant women should also consult their doctors before using green tea. Individuals take MAOI inhibitors (anti-depressant) should avoid taking green tea.

References

arw ^ N. H. Woodward, Teas of the World (1980), as cited in D. A. Balentine, M. E. Harbowy, H. N. Graham, Tea: The Plant and Its Manufacture; Chemistry and Consumption of the Beverage in Caffeine ed G. Spiller (1998)


arw ^ Green Tea: from the University of Maryland Medical Center Alternative/Complementary Medicine library


arw ^ Gradisar H, Pristovsek P, Plaper A, Jerala R (January 2007). "Green tea catechins inhibit bacterial DNA gyrase by interaction with its ATP binding site". J. Med. Chem. 50 (2): 264-71. doi:10.1021/jm060817o. PMID 17228868.


arw ^ New Scientist, 20 March 2004


arw ^ Hirofumi Tachibana, Kiyoshi Koga, Yoshinori Fujimura & Koji Yamada; A receptor for green tea polyphenol EGCG, Nature Structural and Molecular Biology, 2004, http://dx.doi.org/doi:10.1038/nsmb743


arw ^ Santana Rios, G.; Orner, G. A.; Amantana, A.; Provost, C.; Wu, S-Y.; Dashwood, R. H.; Potent antimutagenic activity of white tea in comparison with green tea in the Salmonella assay Mutation Research, 495 61-74 (2001)


arw ^ Sartippour MR, Pietras R, Marquez-Garban DC, et al. (December 2006). "The combination of green tea and tamoxifen is effective against breast cancer". Carcinogenesis 27 (12): 2424-33. doi:10.1093/carcin/bgl066. PMID 16785249. http://carcin.oxfordjournals.org/cgi/pmidlookup?view=long&pmid=16785249.


arw ^ BBC news - 17 March 2009 - green tea may have the power to ward off breast cancer


arw ^ "Green tea 'may block lung cancer'"


arw ^ New England Journal of Medicine 2001;344:632, Tsubono F, Nishino Y


arw ^ Textbook of Gastroenterology, Volume one, 4th edition, 2003 Editor Tadataka Yamada, Lippincott Williams and Wilkins, page 1418


arw ^ Katiyar S, Elmets CA, Katiyar SK (2007). "Green tea and skin cancer: photoimmunology, angiogenesis and DNA repair". J. Nutr. Biochem. 18 (5): 287-96. doi:10.1016/j.jnutbio.2006.08.004. PMID 17049833.


arw ^ Morley N, Clifford T, Salter L, Campbell S, Gould D, Curnow A (2005). "The green tea polyphenol (-)-epigallocatechin gallate and green tea can protect human cellular DNA from ultraviolet and visible radiation-induced damage". Photodermatol Photoimmunol Photomed 21 (1): 15-22. doi:10.1111/j.1600-0781.2005.00119.x. PMID 15634219.


arw ^ Luo D, Min W, Lin XF, Wu D, Xu Y, Miao X (2006). "Effect of epigallocatechingallate on ultraviolet B-induced photo-damage in keratinocyte cell line". Am. J. Chin. Med. 34 (5): 911-22. doi:10.1142/S0192415X06004387. PMID 17080554.


arw ^ Wu ZH, Wang MR, Yan QC, Pu W, Zhang JS (2006). "[UV-induced DNA damage and protective effects of antioxidants on DNA damage in human lens epithelial cells studied with comet assay]" (in Chinese). Zhonghua Yan Ke Za Zhi 42 (11): 1002-7. PMID 17386139.


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arw ^ Zhu J, Luo D, Shen CH, Xu J (2007). "[Photo-protection of epigallocatethi-3-gallate on aging and gene mutation of human skin fibroblasts caused by ultraviolet radiation: an in vitro experiment]" (in Chinese). Zhonghua Yi Xue Za Zhi 87 (20): 1398-401. PMID 17785060.
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arw  ^ FDA Issues Information for Consumers about Claims for Green Tea and Certain Cancers
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arw  ^ Murase T, Haramizu S, Shimotoyodome A, Tokimitsu I, Hase T (2006). "Green tea extract improves running endurance in mice by stimulating lipid utilization during exercise". Am. J. Physiol. Regul. Integr. Comp. Physiol. 290 (6): R1550-6. doi:10.1152/ajpregu.00752.2005. PMID 16410398.
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arw  ^ Fourth International Scientific Symposium on Tea & Human Health
arw  ^ Juneja, LR; Chu, DC; Okubo, T; Nagato, Y; Yokogoshi, H. (1999). "L-Theanine - a unique amino acid of green tea and its relaxation effect in humans". Trends in Food Science & Technology 10 (2): 199-204. doi:10.1016/S0924-2244(99)00044-8.
arw  ^ Drinking Tea May Boost Immune System
arw  ^ "The American Journal of Clinical Nutrition" (Vol. 83, pp.355-361).
arw  ^ Green tea could protect against Alzheimer’s


 arw ^ "Escaping amyloid fate" by Blake E Roberts and James Shorter. Nature Structural & Molecular Biology, vol 15, pp. 544-546 (1 June 2008) doi:10.1038
arw ^ Steptoe, A.; Gibson, E.; Vuononvirta, R.; Williams, E.; Hamer, M.; Rycroft, J.; Erusalimsky, J.; Wardle, J. (2007). "The effects of tea on psychophysiological stress responsivity and post-stress recovery: a randomised double-blind trial". Psychopharmacology 190 (1): 81-89. doi:10.1007/s00213-006-0573-2. PMID 17013636. edit
arw ^ "Black tea soothes away stress". London: University College London. 2006-10-04. http://www.ucl.ac.uk/media/library/tea. Retrieved 2010-01-18.
arw ^ C.L. Nance, M.P. Williamson, T.G. McCormick, S.M. Paulson, W.T. Shearer (2-1-2006). Epigallocatechin Gallate, Green Tea Catechin, Binds to the T Cell Receptor, CD4. Journal of Allergy and Clinical Immunology
arw  ^ "Green tea 'may keep HIV at bay". BBC News. 2007-03-29. http://news.bbc.co.uk/2/hi/health/6502399.stm. Retrieved 2010-01-05.
arw  ^ Textbook of Gastroenterology, Volume one, 4th edition, 2003 Editor Tadataka Yamada, Lippincott Williams and Wilkins, pages 1141-1142.
arw  ^ Tea fights bad breath
arw  ^ BBC News | Health | Cuppa a day is a lifesaver
arw  ^ Health Benefits of Coffee - WebMD
arw  ^ Newswise: Green Tea Compounds Beat OSA-Related Brain Deficits
arw  ^ White Tea Beats Green Tea In Fighting Germs
arw  ^ Inhibitory effect and Anti-venin effect of MEBT
arw  ^ Medical News Today - Tea Reduces Risk Of Stroke, New Research Finds
arw  ^ Medical News Today - New Research Suggests Drinking As Little As One Cup Of Black Tea Per Day Can Help Protect Against Cardiovascular Disease
arw  ^ Silvio Tatti, MD, James M. Swinehart, MD, Claus Thielert, PhD, Hoda Tawfik, PhD, Axel Mescheder, MD, and Karl R. Beutner, MD, PhD. Sinecatechins, a Defined Green Tea Extract, in the Treatment of External Anogenital Warts. Obstetrics and Gynecology 2008;111:1371-9.


 arw ^ Hozawa A et al (2009). "Green tea consumption is associated with lower psychological distress in a general population: the Ohsaki Cohort 2006 Study.". Am J Clin Nutr. 90 (5): 1390-6. doi:10.3945/ajcn.2009.28214. PMID 19793850.


 arw ^ Kaijun Niu et al (2009). "Green tea consumption is associated with depressive symptoms in the elderly". Am J Clin Nutr. 90 (6): 1615-22. doi:10.3945/ajcn.2009.28216. PMID 19828710. http://www.ajcn.org/cgi/content/abstract/90/6/1615.


 arw ^ green tea and rheumatoid arthritis


 arw ^ Tea risk for rheumatoid arthritis


 arw ^ Health Benefits of Green Tea. http://www.webmd.com/food-recipes/features/health-benefits-of-green-tea?page=2.


 arw ^ M. H. Wong, K. F. Fung and H. P. Carr (2003). "Aluminium and fluoride contents of tea, with emphasis on brick tea and their health implications". Toxicology Letters 137 (12): 111-120. doi:10.1016/S0378-4274(02)00385-5.


 arw ^ Yi Lu, Wen-Fei Guo, and Xian-Qiang Yang (2004). "Fluoride Content in Tea and Its Relationship with Tea Quality". J. Agric. Food Chem. 52 (14): 4472-4476. doi:10.1021/jf0308354+S0021-8561(03)00835-5. PMID 15237954.


 arw ^ K. F. Fung, Z. Q. Zhang1, J. W. C. Wong and M. H. Wong (1999). "Fluoride contents in tea and soil from tea plantations and the release of fluoride into tea liquor during infusion". Environmental Pollution 104 (2): 197-205. doi:10.1016/S0269-7491(98)00187-0.


 arw ^ Lung SC, Cheng HW, Fu CB (2008). "Potential exposure and risk of fluoride intakes from tea drinks produced in Taiwan". J Expo Sci Environ Epidemiol 18 (2): 158-66. doi:10.1038/sj.jes.7500574. PMID 17410113.


 arw ^ Malinowska E, Inkielewicz I, Czarnowski W, Szefer P (2008). "Assessment of fluoride concentration and daily intake by human from tea and herbal infusions". Food Chem. Toxicol. 46 (3): 1055-61. doi:10.1016/j.fct.2007.10.039. PMID 18078704.


 arw ^ Calls for FDA to introduce tea fluoride safety standard


 arw ^ Jianyun Ruan and Ming H. Wong (2001). "Accumulation of Fluoride and Aluminium Related to Different Varieties of Tea Plant". Environmental Geochemistry and Health 23 (1): 53-63. doi:10.1023/A:1011082608631.


 arw ^ Bhagwat, T et al., "Flavonoid composition of tea: Comparison of black and green teas", USDA Agricultural Research Service




 arw ^ Tea and Hydration


 arw ^ Michael Liebman and Shawnna Murphy (2007). "Low oxalate bioavailability from black tea". Nutrition Research 27 (5): 273-278. doi:10.1016/j.nutres.2007.04.004.


 arw ^ "Some tea and wine may cause cancer - tannin, found in tea and red wine, linked to esophageal cancer". Nutrition Health Review. 1990. http://findarticles.com/p/articles/mi_m0876/is_n56/ai_9164614.


 arw ^ Hung HC, Huang MC, Lee JM, Wu DC, Hsu HK, Wu MT (2004). "Association between diet and esophageal cancer in Taiwan". J. Gastroenterol. Hepatol. 19 (6): 632-7. doi:10.1111/j.1440-1746.2004.03346.x. PMID 15151616.


 arw ^ Wang JM, Xu B, Rao JY, Shen HB, Xue HC, Jiang QW (2007). "Diet habits, alcohol drinking, tobacco smoking, green tea drinking, and the risk of esophageal squamous cell carcinoma in the Chinese population". Eur J Gastroenterol Hepatol 19 (2): 171-6. doi:10.1097/MEG.0b013e32800ff77a. PMID 17273005.


 arw ^ Laurie Barclay, MD. Hot Tea Consumption Linked to Higher Risk for Esophageal Cancer. Medscape Medical News, April 3, 2009


 arw ^ Mario Lorenz, Nicoline Jochmann, Amélie von Krosigk, Peter Martus, Gert Baumann, Karl Stangl and Verena Stangl (2007). "Addition of milk prevents vascular protective effects of tea". European Heart Journal 28 (2): 219-223. doi:10.1093/eurheartj/ehl442. PMID 17213230.


 arw ^ Milk wrecks the health benefits of tea, New Scientist, 9 January 2007


 arw ^ Reddy VC, Vidya Sagar GV, Sreeramulu D, Venu L, Raghunath M (2005). "Addition of milk does not alter the antioxidant activity of black tea.". Annals of nutrition & metabolism 49 (3): 189-95. doi:10.1159/000087071. PMID 16020939.


 arw http://content.karger.com/ProdukteDB/produkte.asp?Aktion=ShowPDF&ProduktNr=223977&Ausgabe=231143&ArtikelNr=87071&filename=87071.pdf.


 arw ^ Widlansky ME, Duffy SJ, Hamburg NM, Gokce N, Warden BA, Wiseman S, Keaney Jr JF, Frei B et al. (February 2005). "Effects of black tea consumption on plasma catechins and markers of oxidative stress and inflammation in patients with coronary artery disease.". Free radical biology & medicine 38 (4): 499-506. doi:10.1016/j.freeradbiomed.2004.11.013. PMID 15649652.


 arw ^ "Some tea and wine may cause cancer - tannin, found in tea and red wine, linked to esophageal cancer" Nutrition Health Review, Fall, 1990


 arw ^ "Green tea up to 5 times as healthy when citrus juice added". CBC News. 2007-11-14. http://www.cbc.ca/health/story/2007/11/14/citrus-greentea.html. Retrieved 2009-04-24.


arw ^ Rodney J. Green, Angus S. Murphy, Burkhard Schulz, Bruce A. Watkins, Mario G. Ferruzzi (2007). "Common tea formulations modulate in vitro digestive recovery of green tea catechins". Molecular Nutrition & Food Research 51 (9): 1152-1162. doi:10.1002/mnfr.200700086. PMID 17688297.