Maternal serum paraxanthine, a caffeine metabolite, and the risk of spontaneous abortion. Unno, T., Kondo, K., Itakura, H., and Takeo, T. Analysis of (-)-epigallocatechin gallate in human serum obtained after ingesting green tea. By speeding up the nervous system, stimulant medications can make you feel jittery and increase your heart rate. View abstract. View abstract. Cancer Lett. Early research shows that green tea extract seems to improve symptoms and general health in people with lupus. Effects of green tea catechin on polymorphonuclear leukocyte 5'-lipoxygenase activity, leukotriene B4 synthesis, and renal damage in diabetic rats. Consumption of green or black tea does not increase resistance of low-density lipoprotein to oxidation in humans. Efficacy of a green tea extract rich in catechin polyphenols and caffeine in increasing 24-h energy expenditure and fat oxidation in humans. Caffeine can stimulate the body. Smits, P., Temme, L., and Thien, T. The cardiovascular interaction between caffeine and nicotine in humans. View abstract. FDA. View abstract. Venables, M. C., Hulston, C. J., Cox, H. R., and Jeukendrup, A. E. Green tea extract ingestion, fat oxidation, and glucose tolerance in healthy humans. Part 3: teratogenicity and reproductive toxicity studies in rats. View abstract. View abstract. View abstract. 2014 Feb;132(2):377-82. The effect of caffeine, green tea and tyrosine on thermogenesis and energy intake. Psychopharmacology (Berl) 2004;176:320-30. View abstract. Inflamm Bowel Dis. J Nutr.Sci.Vitaminol. This increase in blood pressure is probably due to the caffeine in green tea. Komatsu, T., Nakamori, M., Komatsu, K., Hosoda, K., Okamura, M., Toyama, K., Ishikura, Y., Sakai, T., Kunii, D., and Yamamoto, S. Oolong tea increases energy metabolism in Japanese females. View abstract. Comparative effects of EGCG, green tea and a nutrient mixture on the patterns of MMP-2 and MMP-9 expression in cancer cell lines. 2011;141(10):1862-1870. Massey LK. 2007;55(5):433-440. View abstract. 2011;105(8):1138-1144. Ostrowska, J. and Skrzydlewska, E. The comparison of effect of catechins and green tea extract on oxidative modification of LDL in vitro. 2012 Sep;5(9):1144-54. Maeda-Yamamoto, M., Ema, K., Monobe, M., Shibuichi, I., Shinoda, Y., Yamamoto, T., and Fujisawa, T. The efficacy of early treatment of seasonal allergic rhinitis with benifuuki green tea containing O-methylated catechin before pollen exposure: an open randomized study. Obstet.Gynecol. Proc.Soc.Exp.Biol.Med 1999;220(4):203-209. Onakpoya I, Spencer E, Heneghan C, Thompson M. The effect of green tea on blood pressure and lipid profile: a systematic review and meta-analysis of randomized clinical trials. View abstract. Booth SL, Madabushi HT, Davidson KW, et al. View abstract. Green tea intake lowers fasting serum total and LDL cholesterol in adults: a meta-analysis of 14 randomized controlled trials. Proposed rule: dietary supplements containing ephedrine alkaloids. Crew KD, Brown P, Greenlee H, Bevers TB, Arun B, Hudis C, McArthur HL, Chang J, Rimawi M, Vornik L, Cornelison TL, Wang A, Hibshoosh H, Ahmed A, Terry MB, Santella RM, Lippman SM, Hershman DL. Cochrane Database Syst Rev. Henning M, Fajardo-Lira C, Lee HW, et al. Sang LX, Chang B, Li XH, Jiang M. Green tea consumption and risk of esophageal cancer: a meta-analysis of published epidemiological studies. 3-1-2009;483(1):99-105. Food Chem Toxicol. Xu, H., Becker, C. M., Lui, W. T., Chu, C. Y., Davis, T. N., Kung, A. L., Birsner, A. E., D'Amato, R. J., Wai Man, G. C., and Wang, C. C. Green tea epigallocatechin-3-gallate inhibits angiogenesis and suppresses vascular endothelial growth factor C/vascular endothelial growth factor receptor 2 expression and signaling in experimental endometriosis in vivo. Arterioscler.Thromb.Vasc.Biol. Suzuki Y, Tsubono Y, Nakaya N, et al. View abstract. Levites, Y., Amit, T., Mandel, S., and Youdim, M. B. Neuroprotection and neurorescue against Abeta toxicity and PKC-dependent release of nonamyloidogenic soluble precursor protein by green tea polyphenol (-)-epigallocatechin-3-gallate. View abstract. But there is some conflicting research. Moderate to heavy caffeine consumption during pregnancy and relationship to spontaneous abortion and abnormal fetal growth: a meta-analysis. Eur J Epidemiol 1999;15:181-8. View abstract. Eur J Clin Nutr 2000;54:87-92. Diabetes Care 2000;23:455-9. 2010;17(1):23-27. Ahmed S, Rahman A, Hasnain A, et al. 2019 Oct;34(10):917-926. J Drugs Dermatol. No effect of consumption of green and black tea on plasma lipid and antioxidant levels and on LDL oxidation in smokers. J Nutr 2001;131:2248-51.. View abstract. Tea and coffee brews are not dietary sources of vitamin K-1 (phylloquinone). Early research suggests that taking a specific green tea product twice daily for 8 weeks might improve inflammatory bowel disease and help people with this condition achieve remission. View abstract. Okada, N., Tanabe, H., Tazoe, H., Ishigami, Y., Fukutomi, R., Yasui, K., and Isemura, M. Differentiation-associated alteration in sensitivity to apoptosis induced by (-)-epigallocatechin-3-O-gallate in HL-60 cells. Haller CA, Jacob P 3rd, Benowitz NL. Int J Vitam.Nutr.Res. View abstract. Chong PW, Beah ZM, Grube B, Riede L. IQP-GC-101 reduces body weight and body fat mass: a randomized, double-blind, placebo-controlled study. 2013;22(1):128-137. View abstract. Colon cancer, rectal cancer. A., Parnes, H. L., Sokoloff, M. H., Gretzer, M. B., and Chow, H. H. Randomized, double-blind, placebo-controlled trial of polyphenon E in prostate cancer patients before prostatectomy: evaluation of potential chemopreventive activities. View abstract. Pharmacol.Res. J Nutr. Effect of green tea extract (catechins) in reducing oxidative stress seen in patients of pulmonary tuberculosis on DOTS Cat I regimen. Decreasing the effectiveness of warfarin (Coumadin) might increase the risk of clotting. Somani, S. M. and Gupta, P. Caffeine: a new look at an age-old drug. PLoS One. Coffee, decaffeinated coffee, caffeine, and tea consumption in young adulthood and atherosclerosis later in life: the CARDIA study. Allergic Reactions: One of the side effect of chamomile tea could be allergic reactions. (Silver.Spring) 8-19-2010; View abstract. Caffeine counteracts the ergogenic action of muscle creatine loading. J.Hum.Nutr.Diet. B., Wang, Z. Q., Hu, X. X., and Jiang, Q. W. Cohort study of drinking green tea on liver disease (in Chinese). The main green tea polyphenol epigallocatechin-3-gallate counteracts semen-mediated enhancement of HIV infection. Natl Cancer Inst Monogr 1985;69:229-34. View abstract. Heart disease. He, Y. H. and Kies, C. Green and black tea consumption by humans: impact on polyphenol concentrations in feces, blood and urine. Br.J Pharmacol. Shen, C. L., Chyu, M. C., Pence, B. C., Yeh, J. K., Zhang, Y., Felton, C. K., Doctolero, S., and Wang, J. S. Green tea polyphenols supplementation and Tai Chi exercise for postmenopausal osteopenic women: safety and quality of life report. Yian LG. Epidemiology 2008;19:55-62. Taking green tea along with stimulant drugs might cause serious problems including increased heart rate and high blood pressure. 2009;14(2):154-160. View abstract. Stinging nettle is a plant in the genus Urtica that originated as a native shrub in colder regions of Europe and Asia and is now found worldwide. View abstract. Wang X, Lin YW, Wang S, Wu J, Mao QQ, Zheng XY, Xie LP. View abstract. Health Product Info Watch. Abe SK, Saito E, Sawada N, et al. Biosci.Biotechnol.Biochem 1996;60(12):2066-2068. Chan, C. C., Koo, M. W., Ng, E. H., Tang, O. S., Yeung, W. S., and Ho, P. C. Effects of Chinese green tea on weight, and hormonal and biochemical profiles in obese patients with polycystic ovary syndrome--a randomized placebo-controlled trial. Castellanos FX, Rapoport JL. Katiyar SK, Mohan RR, Agarwal R, Mukhtar H. Protection against induction of mouse skin papillomas with low and high risk of conversion to malignancy by green tea polyphenols. Medicine (Baltimore). A pharmacodynamic interaction between caffeine and phenylpropanolamine. View abstract. Son DJ, Cho MR, Jin YR, et al. Forestalls Nausea and Vomiting. Larsson SC, Wolk A. J Sports Med Phys Fitness 2000;40:71-9. View abstract. Appetite 2012;58(2):767-770. View abstract. View abstract. Dose-response relation between tea consumption and risk of cardiovascular disease and all-cause mortality: A systematic review and meta-analysis of population-based studies. Can.J.Gastroenterol. It’s not all good news, sadly. Choan, E., Segal, R., Jonker, D., Malone, S., Reaume, N., Eapen, L., and Gallant, V. A prospective clinical trial of green tea for hormone refractory prostate cancer: an evaluation of the complementary/alternative therapy approach. Yuan JM, Koh WP, Sun CL, et al. Nawrot P, Jordan S, Eastwood J, et al. 2016;104(6):1671-1682. A., Crowell, J. Serafini, M., Ghiselli, A., and Ferro-Luzzi, A. Setiawan VW, Zhang ZF, Yu GP, et al. Scand.J Med Sci.Sports 3-10-2010; View abstract. 2016;204(1):30-2. Liu K, Zhou R, Wang B, Chen K, Shi LY, Zhu JD, Mi MT. Int J Obes.Relat Metab Disord. J Sleep Res. View abstract. View abstract. Also, some population research suggests that drinking green tea that is very hot is linked to an increased risk of esophageal cancer. Br.J Dermatol. Effects of green tea on weight maintenance after body-weight loss. Huang S, Xu Q, Liu L, et al. Tea can do wonders for your body's health—and for weight loss.When brewed right, there are a lot of positive side effects you will experience from drinking tea every day. Acheson KJ, Gremaud G, Meirim I, et al. Nagao, T., Hase, T., and Tokimitsu, I. Life Sci. 2009;101(6):886-894. View abstract. Clin Pharmacokinet 2000;39:127-53. Japanese Pharmacology and Therapeutics 2008;36(8):767-776. View abstract. Carcinogenesis 2006;27(7):1301-1309. Lin Y, Shi D, Su B, et al. View abstract. Caffeine intake increases the rate of bone loss in elderly women and interacts with vitamin D receptor genotypes. Golden ED, Lam PY, Kardosh A, et al. Free Radic Biol Med 2002;33:1097-105. Mexiletine (Mexitil) interacts with GREEN TEA. Drug Saf 2008;31(6):469-484. View abstract. Tea consumption and the risk of five major cancers: a dose-response meta-analysis of prospective studies. View abstract. Vinson JA, Teufel K, Wu N. Green and black teas inhibit atherosclerosis by lipid, antioxidant, and fibrinolytic mechanisms. J Pharm Pharmacol 2005;57(10):1365-1369. View abstract. Cancer Res 2006;66:1234-40. 4-24-2010;86(17-18):654-660. Weak and brittle bones (osteoporosis). Chow, H. H., Hakim, I. Choi, J. Y., Park, C. S., Kim, D. J., Cho, M. H., Jin, B. K., Pie, J. E., and Chung, W. G. Prevention of nitric oxide-mediated 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-induced Parkinson's disease in mice by tea phenolic epigallocatechin 3-gallate. U.S. Department of Health and Human Services, Public Health Service, National Institutes of Health, National Toxicology Program, 2016. Some research shows that drinking more green tea is linked with a reduced risk of having nasopharyngeal cancer. Efficacy of calcium supplements on bone mass in postmenopausal women. Involvement of human CYP1A isoenzymes in the metabolism and drug interactions of riluzole in vitro. (Tokyo) 1990;38(3):717-720. 2015;145(5):864-70. Mei Y, Qian F, Wei D, Liu J. Thromb Diath Haemorrh 1967;18:670-3. Yoto, A., Motoki, M., Murao, S., and Yokogoshi, H. Effects of L-theanine or caffeine intake on changes in blood pressure under physical and psychological stresses. Zhang, Y. et al., Effects of catechin-enriched green tea beverage on visceral fat loss in adults with a high pro-portion of visceral fat: A double-blind, placebo-controlled, randomized trial, Journal of Functional Foods (2012), doi:10.1016/j.jff.2011.12.010. Circulation 2002;105:2476-81. Int J Cancer 3-15-2009;124(6):1404-1408. Possible contribution of green tea drinking habits to the prevention of stroke. A pharmacological review. Clin.Infect.Dis. Mu, D., Yu, J. X., and Li, D. Obervation on the therapeutic effect in the treatment of 26 patients with fatty liver by tea pigment capsules (in Chinese). WebMD does not provide medical advice, diagnosis or treatment. View abstract. Green tea might have different protective effects in people depending on their genotype or whether they have gone through menopause. 2019;11(11):2612. Research from the University of Glasgow linked heavy tea drinking with an increased risk of developing prostate cancer. Neurobiol.Aging 2009;30(1):81-92. Dermatol.Surg. Ali, M., Afzal, M., Gubler, C. J., and Burka, J. F. A potent thromboxane formation inhibitor in green tea leaves. Also, some population research suggests that increasing green tea intake by two cups daily or drinking 7-10 cups of green tea daily is linked with a reduced risk of lung cancer. Am.J.Clin.Nutr. Before taking it, you should know about black tea health benefits and side effects. Other research shows that taking green tea extract improves markers of liver injury, body mass, and cholesterol in people with NAFLD. Green tea (Camellia sinensis) extract does not alter cytochrome P450 3A4 or 2D6 activity in healthy volunteers. View abstract. View abstract. View abstract. Peri-operative oral caffeine does not prevent postoperative atrial fibrillation after heart valve surgery with cardiopulmonary bypass: a randomized controlled clinical trial. B., Zheng, W., Xu, W. H., Yang, G., Li, H., and Shu, X. O. Gawande, S., Kale, A., and Kotwal, S. Effect of nutrient mixture and black grapes on the pharmacokinetics of orally administered (-)epigallocatechin-3-gallate from green tea extract: a human study. Am J Clin Nutr 1985;41:1210-3. Long-term supplementation of green tea extract does not modify adiposity or bone mineral density in a randomized trial of overweight and obese postmenopausal women. Consumption of black and green tea had no effect on inflammation, haemostasis and endothelial markers in smoking healthy individuals. Sl, Madabushi HT, Davidson KW, et al, Ketikoglou, I., Hohenberg, H. Holstermann... Administration on the health promotion properties of ephedrine/methylxanthine mixtures: animal studies undergoing endurance training ( 18 ).! Cancer 8-7-2006 ; 95 ( 3 ):790-793 on cognitive performance glucosyltransferase from Streptococcus mutans antimutagenic anticlastogenic! Phase II trial of green tea, it is made from the Sexually... 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