Title: Consuming Tea: A Healthy Habit or a Health Hazard

Author: Dr (Colonel) Gurmeet Singh Sarla

 DOI: https://dx.doi.org/10.18535/jmscr/v7i5.123

Abstract

Consuming tea has been believed to be a health promoting habit since ages. Leaves of tea plant ‘Camellia sinensis’ has been found to have medicinal benefits. Types of tea based on processing or harvested leaf development are black tea, green tea, white tea and oolong tea. This review covers findings on the therapeutic properties and anticancer health benefits of green and black tea. Both green tea and black tea have a positive effect on human health.

Keywords: Tea, Camellia sinensis, health benefits.

References

  1. Mukhtar H, Ahmad N. Tea polyphenols: prevention of cancer and optimizing health. Am J ClinNutr. 2000;71:1698S–702S. discussion 1703S–4S.
  2. Zaveri N.T. Green tea and its polyphenoliccatechins: Medicinal uses in cancer and non cancer applications. Life Sci. 2006;78(18):2073–80.
  3. Frankel E.N, Finley J.W. How to standardize the multiplicity of methods to evaluate natural anti- oxidants. J Agric Food Chem. 2008;56(13):4901–8.
  4. Stangl V, Lorenz M, Stangl K. The role of tea and tea flavonoids in cardiovascular health. MolNutr Food Res. 2006;50:218–28.
  5. Duthie G.G, Crozier A. Beverages. In: Goldberg G, editor. In Plants: Diet and Health.London: British Nutrition Foundation, Chapman Hall; 2003. pp. 147–182.
  6. Hakim IA, Harris RB, Weisgerber UM. Tea intake and squamous cell carcinoma of the skin: influence of type of tea beverages. Cancer Epidemiol Biomarkers Prev. 2000;9:727–31.
  7. Naldi L, Gallus S, Tavani A, Imberti GL, La Vecchia C. Risk of melanoma and vitamin A, coffee and alcohol: a case-control study from Italy. Eur J Cancer Prev. 2004;13:503–8.
  8. Jian L, Xie LP, Lee AH, Binns CW. Protective effect of green tea against prostate cancer: a case-control study in southeast China. Int J Cancer. 2004; 108:130–5. 
  9. Jian L, Xie L.P, Lee A.H, editors. et al. Protective effect of green tea against prostate cancer: A case-control study in southeast China. Int J Cancer. 2004;108: 130–5.
  10. Mendilaharsu M, De Stefani E, Deneo-Pellegrini H, Carzoglio JC, Ronco A. Consumption of tea and coffee and the risk of lung cancer in cigarette-smoking men: a case-control study in Uruguay. Lung Cancer. 1998;19:101–7.
  11. Zhong L, Goldberg MS, Gao YT, Hanley JA, Parent ME, Jin F. A population-based case-control study of lung cancer and green tea consumption among women living in Shanghai, China.  2001;12:695–700.
  12. Sun CL, Yuan JM, Koh WP, Yu MC. Green tea, black tea and breast cancer risk: a meta-analysis of epidemiological studies. 2006;27:1310–5.
  13. Zhang M, Holman CD, Huang JP, Xie X. Green tea and the prevention of breast cancer: a case-control study in Southeast China. 2007;28:1074–8.
  14. Min Zhang C, D'Arcy JH, Jiang-ping H, Xing X. Green tea and the prevention of breast cancer: a case-control study in Southeast China.  2005;28 (5):1074–1078.
  15. Gao YT, McLaughlin JK, Blot WJ, Ji BT, Dai Q, Fraumeni JF., Jr Reduced risk of esophageal cancer associated with green tea consumption. J Natl Cancer Inst. 1994;86:855–8.
  16. Zheng JS, Yang J, Fu YQ, Huang T, Huang YJ, Li D. Effects of green tea, black tea, and coffee consumption on the risk of esophageal cancer: a systematic review and meta-analysis of observational studies. Nutrition and Cancer. 2013;65 (1):1–16.
  17. Su LJ, Arab L. Tea consumption and the reduced risk of colon cancer -- results from a national prospective cohort study. Public Health Nutr. 2002;5:419–25.
  18. Koo MW, Cho CH. Pharmacological effects of green tea on the gastrointestinal system. Eur J Pharmacol. 2004;500:177–85.
  19. Sing MF, Yang WS, Gao S, Gao J, Xiang YB. Epidemiological studies of the association between tea drinking and primary liver cancer: a meta-analysis. Eur J Cancer Prev. 2011;20:157–65.
  20. Sakata R, Ueno T, Nakamura T, Sakamoto M, Torimura T, Sata M. Green tea polyphenols epigallocatechin-3-gallate inhibits platelet-derived growth factor-induced proliferation of human hepatic stellate cell line LI90. J Hepatol. 2004; 40:52–59.
  21. Raederstorff DG, Schlachter MF, Elste V, Weber P. Effect of EGCG on lipid absorption and plasma lipid levels in rats. J NutrBiochem. 2003;14:326–32.
  22. Bogdanski P, Suliburska J, Szulinska M, Stepien M, Pupek-Musialik D, Jablecka A. Green tea extract reduces blood pressure, inflammatory biomarkers, and oxidative stress and improves parameters associated with insulin resistance in obese, hypertensive patients. Nutrition Research.  2012;32:421–427.
  23. Kang W-S, Lim I-H, Yuk D-Y, et al. Antithrombotic activities of green tea catechins and (-)-epigallocatechin gallate. Thrombosis Research. 1999;96 (3):229–237.
  24. Iso H, Date C, Wakai K, Fukui M, Tamakoshi A. The relationship between green tea and total caffeine intake and risk for self-reported type 2 diabetes among Japanese adults. Ann Intern Med. 2006; 144:554–62.
  25. Maeda-Yamamoto M. Human clinical studies of tea polyphenols in allergy or life style-related diseases. Current Pharma-ceutical Design. 2013;19(34): 6148–6155.
  26. Yan J, Zhao Y, Suo S, Liu Y, Zhao B. Green tea catechins ameliorate adipose insulin resistance by improving oxidative stress. Free Radical Biology and Medicine. 2012;52(9):1648–1657.
  27. Hegarty VM, May HM, Khaw KT. Tea drinking and bone mineral density in older women. Am J ClinNutr. 2000;71:1003–7.
  28. Tan EK, Tan C, Fook-Chong SM, et al. Dose-dependent protective effect of coffee, tea, and smoking in Parkinson’s disease: a study in ethnic Chinese. J Neurol Sci. 2003;216:163–7.
  29. Hu G, Bidel S, Jousilahti P, Antikainen R, Tuomilehto J. Coffee and tea consumption and the risk of Parkinson’s disease. Movement Disorders. 2007;22:2242–8.
  30. Tan LC, Koh WP, Yuan JM, et al. Differential effects of black versus green tea on risk of Parkinson’s disease in the Singapore Chinese Health Study. Am J Epidemiol. 2008;167:553–60.
  31. Araghizadeh A, Kohanteb J, Fani MM. Inhibitory activity of green tea (Camellia sinensis) extract on some clinically isolated cariogenic and periodontopathic bacteria. Medical Principles and Practice. 2013;22(4):368–372.
  32. Steinmann J, Buer J, Pietschmann T, Steinmann E. Anti-infective properties of epigallocatechin-3-gallate (EGCG), a component of green tea. British Journal of Pharmacology. 2013;168:1059–1073.
  33. Pham NM, Nanri A, Kurotani K, et al. Green tea and coffee consumption is inversely associated with depressive symptoms in a Japanese working population. Public Health Nutrition. 2013
  34. Schmidt M, Schmitz HJ, Baumgart A, Guedon D, Netsch MI, Kreuter MH, Schmidlin CB, Schrenk D. Toxicity of green tea extracts and their constituents in rat hepatocytes in primary culture. Food Chem Toxicol. 2005;43:307–314.
  35. Achudume AC, Owoeye D. Quantitative assessment of heavy metals in some tea marketed in Nigeria - Bioaccumulation of heavy metals in tea. 2010;2:1097–100.
  36. Marcos A, Fisher A, Ree G, Hill SJ. Preliminary study using trace element concentration and a chemometrics approach to determine the geological origin of tea. J Agric At Spectrom.
  37. Salahinejad M, Aflaki F. Toxic and essential mineral elements content of black tea leaves and their tea infusions consumed in Iran.  Biol Trace Elem Res. 2010; 134:109–17.
  38. Yang C.S, Wang H, Li G.X, Yang Z, Guan F, Jin H. Cancer prevention by tea: Evidence from laboratory studies. Pharmacol Res. 2011;64(2):113–22.

Corresponding Author

Dr (Colonel) Gurmeet Singh Sarla

Classified Specialist Surgery

Military Hospital Devlali, Nasik, Maharshtra, India Pin: 422401