Green Tea

Camellia sinensis

Green tea Camellia Sinensis L. is a bush or small tree of the Teaceae family. The green tea plant is original in the warm, rainy Asian forests, from Burma to Vietnam and Southern China. Tea drinking is a practice brought from the East, currently it is a widespread habit. Tea is mostly grown in India, Sri Lanka and China. The used parts are the leaves which undergo in a milder treatment process to dry without fermenting.
Tea leaves contain methylxanthines (mostly caffeine, also known as theine), polyphenols, such as phenolic acids (chlorogenic, caffeic, gallic), and diverse flavonoids (quercetin, campferol, myricetin). It contains epigallocatechin gallate, tannins, carbohydrates, vitamins B1, B2 and C, minerals and essential oil.

Caffeine stimulates the central nervous system (reduces fatigue and inhibits sleep) and the cardiorespiratory centre. Polyphenols were shown to be inhibitors of lipid peroxidation and free radical scavengers. It was also observed its capability to stimulate lipolysis by potentiation of the catecholamines.

Green tea is traditionally used in situations of physical or psychic asthenia, as a coadjuvant to diet regimens, atherosclerosis, and hyperlipidemias and to promote the renal elimination of water.

If you wish, you can find more information about green tea in the scientific studies and literature that we provide here.

McKay DL and Blumberg JB (2002). The Role of Tea in Human Health: An Update. Journal of the American College of Nutrition 21 (1): 1-13. (Review)

Cabrera C et al. (2006). Beneficial Effects of Green Tea—A Review. Journal of the American College of Nutrition 25 (2): 79-99. (Review)

Tinahones FJ et al. (2008). Green Tea Reduces LDL Oxidability and Improves Vascular Function. Journal of the American College of Nutrition 27 (2): 209-213.

Hininger-Favier I et al. (2009). Green Tea Extract Decreases Oxidative Stress and Improves Insulin Sensitivity in an Animal Model of Insulin Resistance, the Fructose-Fed Rat. Journal of the American College of Nutrition 28 (4): 355-361.

McKay DL and Blumberg JB (2007). Roles for Epigallocatechin Gallate in Cardiovascular Disease and Obesity: An Introduction. Journal of the American College of Nutrition 26 (4): 362S-365S.

Wolfram S (2007). Effects of Green Tea and EGCG on Cardiovascular and Metabolic Health. Journal of the American College of Nutrition 26 (4): 373S-388S.

Romeo et al. (2009). The Major Green Tea Polyphenol, (-)-Epigallocatechin 3-Gallate, Induces Heme Oxygenase in Rat Neurons and Acts as an Effective Neuroprotective Agent against Oxidative Stress. Journal of the American College of Nutrition 28 (4): 492S-499S.

Zheng X et al. (2011). Green tea intake lowers fasting serum total and LDL cholesterol in adults: a meta-analysis of 14 randomized controlled trials1–4. The American Journal of Clinical Nutrition 94: 601-610.

Rebello SA et al. (2011). Coffee and tea consumption in relation to inflammation and basal glucose metabolism in a multi-ethnic Asian population: a cross sectional study. Nutrition Journal 10:61.

Brown AL et al. (2011). Health effects of green tea catechins in overweight and obese men: a randomised controlled crossover trial. British Journal of Nutrition pp 1-10.



Cunha AP, Silva AP, Roque OR (2012). Plantas e Produtos Vegetais em Fitoterapia, 4ª Edição, Fundação Calouste Gulbenkian Serviço de Educação e Bolsas, 230-231.

Physicians Desk Reference for Herbal Medicines (2000), 2nd Edition, Thomson Medical Economics, 369-372.



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