Althea Vol 2 No 1 abstrk Edit.indd


Althea Medical Journal. 2015;2(1)

AMJ, April 2015 

Green Tea and its Effect on Hemostasis Measured by 
Thrombelastography

Bryant Alyzandyr Eumhyn Chua,1 Trully D. Sitorus,2 Nadjwa Zamalek Dalimoenthe3
1Faculty of Medicine Universitas Padjadjaran, 2Department of Pharmacology and Therapy
 Faculty of Medicine Universitas Padjadjaran, 3Department of Clinical Pathology Faculty of 

Medicine Universitas Padjadjaran/Dr. Hasan Sadikin General Hospital Bandung
 

Abstract

Background: Increasing health problems may come from changes in lifestyle including stressful 
lifestyles, high calorie diets, and lack of physical activity. Those may also lead to an increase 
occurrence of abnormal hemostasis. Green tea has been well known for its many benefits, including 
its antithrombotic effect. The aim of this study was to determine whether the consumption of 
green tea actually affects hemostasis and to measure changes in hemostatic parameters after its 
consumption.
Methods: A preliminary explorative study was conducted on 3 healthy female subjects aged 
between 21 to 22 years old for 8 weeks from October to November 2012 in Jatinangor, Sumedang, 
Indonesia. The subjects were subjected to initial thrombelastography analysis and started drinking 
green tea twice a day after meals. The solution was made by steeping a teabag in 250ml water of 
70°C for 2 minutes. After 8 weeks, another thrombelastography analysis was performed to the 
subjects. 
Results: Pre- and post-intervention results of the analysis were averaged and compared according 
to the parameters. The results of this study showed prolonged R (Reaction-time) and K (K-time), 
decreased α (angle) and MA (Maximum Amplitude), and increased LY30 (lysis at 30 minutes), 
showing an overall reduction in coagulability.
Conclusions: The consumption of green tea twice a day for 8 weeks affects hemostasis with 
hemostatic parameters measured by thrombelastography show differences before and after 
consumption. 

Keywords: Green tea, hemostasis, thrombelastography

Correspondence: Bryant Alyzandyr Eumhyn Chua, Faculty of Medicine, Universitas Padjadjaran, Jalan Raya Bandung-
Sumedang Km.21, Jatinangor, Sumedang, Indonesia, Phone: +628170205778, Email: alyzandyr@gmail.com