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Green Tea Case Study

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Green Tea Case Study
Compared with other kinds of tea, green tea is richest source of catechins. Epidemiological studies have showed consumption of green tea can reduce the risks of cardiovascular diseases. However, due to the species of green tea and the health condition of participants, the amount of green tea being consumed per day varies from studies. Some experiments both in vitro and in vivo have been conducted in order to know how green tea reduce the risks of cardiovascular diseases. However, the results are inconsistent and the mechanisms remain unclear. In this review article, the potential mechanisms will be showed from five aspects: lowering cholesterol level, inhibiting oxidation of LDL, improving vascular endothelial function, decreasing blood pressure and having anti-atherosclerotic effect. In the discussion part, the adverse effects of high consumption of green tea will be showed. To sum up, there is no conclusive evidences that green tea can reduce the risks of cardiovascular diseases. Key words: Green tea, Catechins, Cardiovascular diseases
Introduction
Cardiovascular diseases (CVD) are a group of degenerative diseases of the heart and blood circulatory system. According to WHO, 54% of deaths from noncommunicable diseases are attributed by cardiovascular diseases in Eastern …show more content…
MMP is one of proteinases and plays an important role in tissue remodeling. MMP can have a positive effect on those injured arteries. By drinking green tea, the amount of MMP increases,which can repair atherosclerotic tissues. Besides, green tea was proved to have anti-atherosclerotic effect indicated by the reducing expression of vascular endothelial growth factor (VEGF) in atherosclerotic plaque ( Basu et al., 2007). The main function of VEGF is vasculogenesis. Decrease the expression of VEGF in atherosclerotic plaque can reduce the severity of
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