Journal of Tea Science Research, 2024, Vol.14, No.2, 102-111 http://hortherbpublisher.com/index.php/jtsr 106 particularly EGCG, which have been shown to reduce blood glucose levels and improve insulin sensitivity, thereby aiding in diabetes prevention. 5.2 Case Studies on cardiovascular health Tea polyphenols have shown significant benefits in cardiovascular health through various mechanisms. Giglio et al. (2018) discusses the cardioprotective functions of polyphenols, including those from tea, which help in lowering blood pressure, improving endothelial function, and reducing inflammation, thereby preventing cardiovascular diseases. Cicero and Colletti (2018) focuses on the lipid-lowering and atheroprotective effects of polyphenols from tea, which help in reducing the risk of cardiovascular diseases by lowering LDL cholesterol and preventing its oxidation. Moreover, Zhou et al. (2021) highlights the beneficial effects of green tea polyphenols on the cardiovascular system, including reducing blood pressure and improving lipid profiles, which are crucial for cardiovascular health. 5.3 Case studies on cancer prevention Tea polyphenols have been investigated for their potential in cancer prevention, with several case studies providing evidence. Olcha et al. (2022) highlights the anticancer properties of tea polyphenols, particularly in the context of endometrial cancer, suggesting that regular tea consumption can aid in cancer prevention (Figure 3). Similarly, t Rudrapal et al. (2022a) discusses the chemopreventive effects of dietary polyphenols, including those found in tea, against various cancers by reducing oxidative stress and inflammation. Moreover, Yan et al. (2020) reviews the anticancer effects of tea polyphenols, which are attributed to their antioxidant and anti-inflammatory properties, helping in the prevention of cancer. Figure 3 Beneficial effects of tea consumption on risk reduction in endometrial cancer (Adopted from Olcha et al., 2022) Image caption: ↑ increased, ↓ decreased (Adopted from Olcha et al., 2022)
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