The Health Benefits of Green Tea
According to an ancient Chinese legend, a Chinese emperor discovered tea when leaves from a wild tea bush fell into a pot of water he was boiling. Green tea originates from China, and is also now cultivated in India, Ceylon and Japan. It has recently become popular in Western countries where it has been more traditional to drink black teas.
The health benefits of green tea include decreasing breast cancer risk, reducing LDL cholesterol, and reduced risk of type 2 diabetes.
Health Benefits of Green Tea
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A recent study among smokers and non-smokers, those who did not drink green tea had a 5.16-fold increased risk of lung cancer compared with those who drank at least one cup of green tea per day. Among smokers, those who did not drink green tea at all had a 12.71-fold increased risk of lung cancer compared with those who drank at least one cup of green tea per day. |
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EGCG Content in different green teas
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EGCG concentration (% of leaf weight)
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| Tikuan yin | 0.9% |
| Pou chong | 0.9% |
| Dong ding | 1% |
| Lung chin | 1.5% |
| Meng ding | 1.5% |
| Paimutan | 2% |
| Yuzan | 2% |
| Yunnan | 2% |
| Matcha | 2.8% |
| Gyokuro | 2.9% |
| Pilo chun emperor | 2.9% |
| Gyokuro #2 | 4.1% |
| Sencha #2 | 4.2% |
| Sencha #1 | 4.5% |
| Gyokuro #2 | 4.8% |
| Sencha-uchiyama | 5.6% |
2. EGCG might be unsafe for pregnant womenRelated Articles
References:
1. Foods to Fight Cancer by Professor Richard Beliveau and Dr Denis Gingras.
2. Dulloo AG, Duret C, Rohrer D, Girardier L, Mensi N, Fathi M, Chantre P, Vandermander J. Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans. Am J Clin Nutr. 1999 Dec;70(6):1040-5. PMID: 10584049.
3. Auvichayapat P, Prapochanung M, Tunkamnerdthai O, Sripanidkulchai BO, Auvichayapat N, Thinkhamrop B, Kunhasura S, Wongpratoom S, Sinawat S, Hongprapas P. Effectiveness of green tea on weight reduction in obese Thais: A randomized, controlled trial. Physiol Behav. 2008 Feb 27;93(3):486-91. Epub 2007 Oct 18. PMID: 18006026.
4. Nagao T, Hase T, Tokimitsu I. A green tea extract high in catechins reduces body fat and cardiovascular risks in humans. Obesity (Silver Spring). 2007 Jun;15(6):1473-83. PMID: 17557985.
5. Maron DJ, Lu GP, Cai NS, Wu ZG, Li YH, Chen H, Zhu JQ, Jin XJ, Wouters BC, Zhao J. Cholesterol-lowering effect of a theaflavin-enriched green tea extract: a randomized controlled trial. Arch Intern Med. 2003 Jun 23;163(12):1448-53. PMID: 12824094.
6. Tsuneki H, Ishizuka M, Terasawa M, Wu JB, Sasaoka T, Kimura I. Effect of green tea on blood glucose levels and serum proteomic patterns in diabetic (db/db) mice and on glucose metabolism in healthy humans. BMC Pharmacol. 2004 Aug 26;4:18. PMID: 15331020.
7. Chiu AE, Chan JL, Kern DG, Kohler S, Rehmus WE, Kimball AB. Double-blinded, placebo-controlled trial of green tea extracts in the clinical and histologic appearance of photoaging skin. Dermatol Surg. 2005 Jul;31(7 Pt 2):855-60; discussion 860. PMID: 16029678.
8. You SQ. [Study on feasibility of Chinese green tea polyphenols (CTP) for preventing dental caries] Zhonghua Kou Qiang Yi Xue Za Zhi. 1993 Jul;28(4):197-9, 254. PMID: 8174399.
9. Adcocks C, Collin P, Buttle DJ. Catechins from green tea (Camellia sinensis) inhibit bovine and human cartilage proteoglycan and type II collagen degradation in vitro. J Nutr. 2002 Mar;132(3):341-6. PMID: 11880552.
10. Monteiro R, Assunção M, Andrade JP, Neves D, Calhau C, Azevedo I. Chronic green tea consumption decreases body mass, induces aromatase expression, and changes proliferation and apoptosis in adult male rat adipose tissue. J Nutr. 2008 Nov;138(11):2156-63. PMID: 18936213.
11. Sun CL, Yuan JM, Koh WP, Yu MC. Green tea, black tea and breast cancer risk: a meta-analysis of epidemiological studies. Carcinogenesis. 2006 Jul;27(7):1310-5. Epub 2005 Nov 25. PMID: 16311246.
12. Yuan JM, Koh WP, Sun CL, Lee HP, Yu MC. Green tea intake, ACE gene polymorphism and breast cancer risk among Chinese women in Singapore. Carcinogenesis. 2005 Aug;26(8):1389-94. Epub 2005 Mar 31. PMID: 15802301.
1. Foods to Fight Cancer by Professor Richard Beliveau and Dr Denis Gingras.
2. Dulloo AG, Duret C, Rohrer D, Girardier L, Mensi N, Fathi M, Chantre P, Vandermander J. Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans. Am J Clin Nutr. 1999 Dec;70(6):1040-5. PMID: 10584049.
3. Auvichayapat P, Prapochanung M, Tunkamnerdthai O, Sripanidkulchai BO, Auvichayapat N, Thinkhamrop B, Kunhasura S, Wongpratoom S, Sinawat S, Hongprapas P. Effectiveness of green tea on weight reduction in obese Thais: A randomized, controlled trial. Physiol Behav. 2008 Feb 27;93(3):486-91. Epub 2007 Oct 18. PMID: 18006026.
4. Nagao T, Hase T, Tokimitsu I. A green tea extract high in catechins reduces body fat and cardiovascular risks in humans. Obesity (Silver Spring). 2007 Jun;15(6):1473-83. PMID: 17557985.
5. Maron DJ, Lu GP, Cai NS, Wu ZG, Li YH, Chen H, Zhu JQ, Jin XJ, Wouters BC, Zhao J. Cholesterol-lowering effect of a theaflavin-enriched green tea extract: a randomized controlled trial. Arch Intern Med. 2003 Jun 23;163(12):1448-53. PMID: 12824094.
6. Tsuneki H, Ishizuka M, Terasawa M, Wu JB, Sasaoka T, Kimura I. Effect of green tea on blood glucose levels and serum proteomic patterns in diabetic (db/db) mice and on glucose metabolism in healthy humans. BMC Pharmacol. 2004 Aug 26;4:18. PMID: 15331020.
7. Chiu AE, Chan JL, Kern DG, Kohler S, Rehmus WE, Kimball AB. Double-blinded, placebo-controlled trial of green tea extracts in the clinical and histologic appearance of photoaging skin. Dermatol Surg. 2005 Jul;31(7 Pt 2):855-60; discussion 860. PMID: 16029678.
8. You SQ. [Study on feasibility of Chinese green tea polyphenols (CTP) for preventing dental caries] Zhonghua Kou Qiang Yi Xue Za Zhi. 1993 Jul;28(4):197-9, 254. PMID: 8174399.
9. Adcocks C, Collin P, Buttle DJ. Catechins from green tea (Camellia sinensis) inhibit bovine and human cartilage proteoglycan and type II collagen degradation in vitro. J Nutr. 2002 Mar;132(3):341-6. PMID: 11880552.
10. Monteiro R, Assunção M, Andrade JP, Neves D, Calhau C, Azevedo I. Chronic green tea consumption decreases body mass, induces aromatase expression, and changes proliferation and apoptosis in adult male rat adipose tissue. J Nutr. 2008 Nov;138(11):2156-63. PMID: 18936213.
11. Sun CL, Yuan JM, Koh WP, Yu MC. Green tea, black tea and breast cancer risk: a meta-analysis of epidemiological studies. Carcinogenesis. 2006 Jul;27(7):1310-5. Epub 2005 Nov 25. PMID: 16311246.
12. Yuan JM, Koh WP, Sun CL, Lee HP, Yu MC. Green tea intake, ACE gene polymorphism and breast cancer risk among Chinese women in Singapore. Carcinogenesis. 2005 Aug;26(8):1389-94. Epub 2005 Mar 31. PMID: 15802301.
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