This document summarizes several studies on the relationship between coffee/tea consumption and health risks. It finds that coffee/tea intake can have contradictory effects depending on the type of cancer. A study in Spain found increased risk of bladder cancer only in those drinking 4 or more cups of coffee per day. A study in Iran associated intervals of drinking tea of 2-3 minutes or less than two minutes with higher risk of esophageal cancer. Another study found a lower risk of brain tumors among those drinking 5 or more cups of coffee per day. In conclusion, the effects of coffee/tea on cancer risk depend on the specific cancer and more research is needed to understand the active ingredients involved.

1. Does the intake of
coffee and/or tea
really benefits our
health?
Eduardo E. Rivera Cintrón
UPR Cayey
Rise Program
December 2, 2011

2. Introduction
 Coffee, and its
benefits
 Tea, and Its
benefits
 Tea,
coffee and
cancer

3. Coffee and bladder
cancer
 Villanueva and collaborators
2009, conducted a study in
Spain
 18 hospitals located in five
different areas
 Questionnaire
 The average cups of coffee
drank were 2.4
 Risk was found only in the
group who drank 4 or more
cups of coffee a day

4. Tea and esophageal
cancer
 Esophagus cancer kills nearly
500,000 people a year.
 Islami et al, 2009 conducted a
study was concentrated in the
area of Golestan, Iran.
 Questionnaire
 Intervals of 2-3 minutes and
and less than two minutes were
associated with an increased
risk of esophageal cancer.

5. Tea and coffee related to
brain tumors
 Participants took a food
questionnaire
 There was a significantly
lower risk of glioma
among men and
women who consumed
five or more cups a day
compared with the ones
who drank one cup or
less a day. (Holick 2010)

6. Conclusion
 Inand overall point of view the intake of
coffee and/or tea had contradictory
results depending on the type of cancer
 Study what ingredient in coffee causes
cancer
 Study the ingredient tannin to confirm the
association with increase of esophageal
cancer

7. References
 Holick C, Smith S., Giovanucci E, Michaud D, 2010. Coffee, tea, caffeine
intake and risk of adult glioma 3 prospective study, Cancer
Epidemiology, Biomarkers & Prevention (Internet); (cited January 2010).
Doi: 10.1158/1055-9965.EPI-09-0732 (approximately 9 pages), available in
http://cebp.aacrjournals.org/content/19/1/39.long

 Islami F, Purshams A, Nasrollahzadeh D, et al; Tea Drinking habits and
oseophageal cancer in a high risk area in northern Iran: Population
based case-control study; BMJ [Internet]; [Cited 2009 March 26]; 338 doi:
10.1136/bmj.b929, available at
http://www.bmj.com/content/338/bmj.b929
 Naghma K, Mukhtar H, Cancer mestatasis: prevention and treatment by
green tea. BMC Cancer. [Published 2010 September 23] Doi: 10.1007/s
10555 010 92361, Available at:
http://www.biomedcentral.com/1471-2407/11/96

8.  Villanueva C, Silverman D, Murta Nascimiento C, et al; Coffee
consumption, genetic susceptibility and bladder cancer:
Cancer causes and control: [Published in formal form 2009
February 20]. Doi 10.1007/s10552-008-9226-6: (approximate 7
pages) Available at
http://www.ncbi.nlm.nih.gov/pubmed/18798002
 Xiaofeng Yu, Zhijun Bao, Juan Zou, Jie Dong, Coffee
consumption and the risk cancer: a meta analysis of cohort
studies. PubMed. [Published 2011 March 15] Doi:
10.1186/1471-11-96, Available at
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3066123/?tool=pubmed