Principal Proposed Uses
What Is Black Tea Used for Today?
Interactions You Should Know About
- MAO inhibitors : The caffeine in black tea could cause dangerous drug interactions.
- Stimulant drugs such as Ritalin: The stimulant effects of black tea might be amplified.
- Drugs to prevent heart arrhythmias or to treat insomnia , heartburn , ulcers , or anxiety : Black tea might interfere with their action.
- Folic acid : Black tea may decrease the absorption of folic acid into the blood stream. 22
1 Hakim IA, Alsaif MA, Alduwaihy M, et al. Tea consumption and the prevalence of coronary heart disease in Saudi adults: results from a Saudi national study. Prev Med . 2002;36:64-70.
2 Vinson JA. Black and green tea and heart disease: a review. Biofactors . 2001;13:127-132.
3 Sesso HD, Paffenbarger RS Jr, Oguma Y, et al. Lack of association between tea and cardiovascular disease in college alumni. Int J Epidemiol . 2003;32:527-533.
4 Vinson JA, Teufel K, Wu N, et al. Green and black teas inhibit atherosclerosis by lipid, antioxidant, and fibrinolytic mechanisms. J Agric Food Chem . 2004;52:3661-3665.
5 Davies MJ, Judd JT, Baer DJ, et al. Black tea consumption reduces total and LDL cholesterol in mildly hypercholesterolemic adults. J Nutr . 2003;133:3298S-3302S.
6 Maron DJ, Lu GP, Cai NS, et al. Cholesterol-lowering effect of a theaflavin-enriched green tea extract: a randomized controlled trial. Arch Intern Med . 2003;163:1448-1453.
7 Kraemer WJ, French DN, Spiering BA, et al. Cortitrol supplementation reduces serum cortisol responses to physical stress. Metabolism . 2005;54:657-668.
8 Blot WJ, McLaughlin JK, Chow WH, et al. Cancer rates among drinkers of black tea. Crit Rev Food Sci Nutr . 1998;37:739-760.
9 Hartman TJ, Tangrea JA, Pietinen P, et al. Tea and coffee consumption and risk of colon and rectal cancer in middle-aged Finnish men. Nutr Cancer . 1998;31:41-48.
10 Mukhtar H, Ahmad N. Tea polyphenols: prevention of cancer and optimizing health. Am J Clin Nutr . 2000;71:1698S-1702S; discussion 1703S-4S.
11 Wu AH, Yu MC, Tseng CC, et al. Green tea and risk of breast cancer in Asian Americans. Int J Cancer . 2003;106:574-579.
12 Arab L, Il'yasova D. The epidemiology of tea consumption and colorectal cancer incidence. J Nutr . 2003;133:3310S-3318S.
13 Hegarty VM, May HM, Khaw KT. Tea drinking and bone mineral density in older women. Am J Clin Nutr . 2000;71:1003-1007.
14 Cannon ME, Cooke CT, McCarthy JS. Caffeine-induced cardiac arrhythmia: an unrecognised danger of healthfood products. Med J Aust. 2001;174:520-521.
15 Kimura K, Ozeki M, Juneja LR, et al. L-Theanine reduces psychological and physiological stress responses. Biol Psychol. 2006 Aug 21. [Epub ahead of print]
16 Kraemer WJ, French DN, Spiering BA, et al. Cortitrol supplementation reduces serum cortisol responses to physical stress. Metabolism . 2005;54:657-668.
17 Mackenzie T, Leary L, Brooks WB. The effect of an extract of green and black tea on glucose control in adults with type 2 diabetes mellitus: double-blind randomized study. Metabolism. 2007;56:1340-1344.
18 Mukamal KJ, MacDermott K, Vinson JA, et al. A 6-month randomized pilot study of black tea and cardiovascular risk factors. Am Heart J. 2007;154:724.e1-6.
19 Rogers PJ, Smith JE, Heatherley SV, et al. Time for tea: mood, blood pressure and cognitive performance effects of caffeine and theanine administered alone and together. Psychopharmacology (Berl). 2007 Sep 23. [Epub ahead of print]
20 Bryans JA, Judd PA, Ellis PR. The effect of consuming instant black tea on postprandial plasma glucose and insulin concentrations in healthy humans. J Am Coll Nutr. 2007;26:471-477.
21 Nobre AC, Rao A, Owen GN. L-theanine, a natural constituent in tea, and its effect on mental state. Asia Pac J Clin Nutr. 2008;17(suppl 1):167-168.
22 Alemdaroglu NC, Dietz U, Wolffram S, et al. Influence of green and black tea on folic acid pharmacokinetics in healthy volunteers: potential risk of diminished folic acid bioavailability. Biopharm Drug Dispos. 2008 Jun 12.
23 Lyon MR, Kapoor MP, Juneja LR. The effects of L-theanine (Suntheanine) on objective sleep quality in boys with attention deficit hyperactivity disorder (ADHD): a randomized, double-blind, placebo-controlled clinical trial. Altern Med Rev. 2011;16(4):348-354.
24 Hodgson JM, Puddey IB, Woodman RJ, et al. Effects of black tea on blood pressure: a randomized controlled trial. Arch Intern Med. 2012;172(2):186-188.
- Reviewer: EBSCO CAM Review Board
- Review Date: 07/2012 -
- Update Date: 07/25/2012 -
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